Synthesis and characterization of Ru(II) phenyl-3-indenylidene olefin metathesis type complexes
- Authors: Yalezo, Ntsikelelo
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Chemistry)
- Identifier: vital:11351 , http://hdl.handle.net/10353/d1021128
- Description: In this study, a series of Ru(II) phenyl-3-indenylidene complexes with general formula of [RuCl2(NHC)(Ind)(L)] (where L= triphenylphosphine, pyridine and NHC = five different types of N-heterocyclic carbene ligands), have been synthesized and characterized using FT-IR, UV-Vis, elementally analysis and melting/decomposition point. The N,N’-diarylimidazolinium chlorides have been used as N-heterocyclic carbene precursors and were synthesized from their corresponding N,N’-diarylformamidines and further characterized using 1H-NMR, 13C-NMR, FTIR and melting point determination. The infrared spectra of the N,N’-diarylimidazolinium chlorides show a quaternary nature (R2N=C+) with broad vibration band in region 3300-3400 cm-1. The disappearance of this vibration band in the infrared spectra of the ruthenium(II) complexes was used to confirm the coordination of the ligand to the ruthenium ions. The percentage analysis of carbon, hydrogen and nitrogen obtained corresponded with the calculated percentages of these atoms in the complexes with the slight difference of less than 1%. The electronic spectra of the complexes show three distinct absorption bands. The two bands are due to intraligand charge transfers transition assigned to π→π*, n→π* and third band is due to d-d transition, signifying the presence of the metal ion. The synthesized Ru(II) complexes did not show any of melting, however a change in colour was observed signifying the decomposition of the complexes.
- Full Text:
- Date Issued: 2015
- Authors: Yalezo, Ntsikelelo
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Chemistry)
- Identifier: vital:11351 , http://hdl.handle.net/10353/d1021128
- Description: In this study, a series of Ru(II) phenyl-3-indenylidene complexes with general formula of [RuCl2(NHC)(Ind)(L)] (where L= triphenylphosphine, pyridine and NHC = five different types of N-heterocyclic carbene ligands), have been synthesized and characterized using FT-IR, UV-Vis, elementally analysis and melting/decomposition point. The N,N’-diarylimidazolinium chlorides have been used as N-heterocyclic carbene precursors and were synthesized from their corresponding N,N’-diarylformamidines and further characterized using 1H-NMR, 13C-NMR, FTIR and melting point determination. The infrared spectra of the N,N’-diarylimidazolinium chlorides show a quaternary nature (R2N=C+) with broad vibration band in region 3300-3400 cm-1. The disappearance of this vibration band in the infrared spectra of the ruthenium(II) complexes was used to confirm the coordination of the ligand to the ruthenium ions. The percentage analysis of carbon, hydrogen and nitrogen obtained corresponded with the calculated percentages of these atoms in the complexes with the slight difference of less than 1%. The electronic spectra of the complexes show three distinct absorption bands. The two bands are due to intraligand charge transfers transition assigned to π→π*, n→π* and third band is due to d-d transition, signifying the presence of the metal ion. The synthesized Ru(II) complexes did not show any of melting, however a change in colour was observed signifying the decomposition of the complexes.
- Full Text:
- Date Issued: 2015
An investigation on the opinions of teachers on the policy implementation of life orientation curriculum: a case study of five schools in Cofimvaba Education District
- Authors: Matshikiza, Spokazi
- Date: 2014
- Subjects: Curriculum-based assessment -- South Africa , Curriculum planning -- South Africa , High school teaching --South Africa
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: http://hdl.handle.net/10353/679 , vital:26487 , Curriculum-based assessment -- South Africa , Curriculum planning -- South Africa , High school teaching --South Africa
- Description: The purpose of this study was to investigate the opinions of teachers on the implementation of Life Orientation curriculum in five schools of the Cofimvaba Education District. In 1994, there were so many changes in South Africa which brought educational transformation at the fore front and centre of all discussions about the changes in general. The curriculum was reviewed and perceived as a guide meant to reflect the values and principles for envisaged learner such as human rights, social and environmental justice with a high level of skills, values and knowledge. Life Orientation as a compulsory subject that was introduced in the epitome of these changes and presents South Africa with the opportunity of providing a meaningful contribution to its youth and mainly as a partial solution to various social problems. The bottom-up model was used to explain the data which was collected from 5 schools in Cofimvaba district using structured interview schedule The schools selected were based in the rural areas of Cofimvaba District and the number of participants interviewed were 15 teachers with different educational qualifications. The data was then arranged and sorted into common themes as well as tallying and ranking of the responses. This was done in order to uncover the main issues that make the findings of the current study. The data collected revealed that some of the Life Orientation teachers from the GET Band (school 2: 3 teachers, school 3: 6 teachers and school 5: 2 teachers) did not receive any training nor support from the Department of Education on implementing Life Orientation and that resulted to implementation difficulties in their schools. However, some teachers that were interviewed in school 1, 2 (3 teachers) and in school 4 joyfully responded by informing the researcher that the Department of Education was supportive to such an extent that the department has provided study material, teaching material, annual teaching plan and also organised support workshops for them. Although that was the case, some schools (2, 3 and 5) are still experiencing some shortages in terms of teaching materials as they go to the neighbouring schools for support. Though there was support that was given by the Department of Education to Life Orientation, it is still inadequate as it could not cater for all the needs of the schools. In addition, the challenges faced by the above mentioned schools may also result in the provision of unbalanced LO curriculum implementation. Support and monitoring is crucial aspect when it comes to implementation of a certain learning area especially when dealing with Life Orientation. This is an easy subject to deal with since it entails issues of life, therefore, whatever support that needs to be provided in future will be appreciated in order to the teachers to be able to implement the curriculum according to its expected standards.
- Full Text:
- Date Issued: 2014
- Authors: Matshikiza, Spokazi
- Date: 2014
- Subjects: Curriculum-based assessment -- South Africa , Curriculum planning -- South Africa , High school teaching --South Africa
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: http://hdl.handle.net/10353/679 , vital:26487 , Curriculum-based assessment -- South Africa , Curriculum planning -- South Africa , High school teaching --South Africa
- Description: The purpose of this study was to investigate the opinions of teachers on the implementation of Life Orientation curriculum in five schools of the Cofimvaba Education District. In 1994, there were so many changes in South Africa which brought educational transformation at the fore front and centre of all discussions about the changes in general. The curriculum was reviewed and perceived as a guide meant to reflect the values and principles for envisaged learner such as human rights, social and environmental justice with a high level of skills, values and knowledge. Life Orientation as a compulsory subject that was introduced in the epitome of these changes and presents South Africa with the opportunity of providing a meaningful contribution to its youth and mainly as a partial solution to various social problems. The bottom-up model was used to explain the data which was collected from 5 schools in Cofimvaba district using structured interview schedule The schools selected were based in the rural areas of Cofimvaba District and the number of participants interviewed were 15 teachers with different educational qualifications. The data was then arranged and sorted into common themes as well as tallying and ranking of the responses. This was done in order to uncover the main issues that make the findings of the current study. The data collected revealed that some of the Life Orientation teachers from the GET Band (school 2: 3 teachers, school 3: 6 teachers and school 5: 2 teachers) did not receive any training nor support from the Department of Education on implementing Life Orientation and that resulted to implementation difficulties in their schools. However, some teachers that were interviewed in school 1, 2 (3 teachers) and in school 4 joyfully responded by informing the researcher that the Department of Education was supportive to such an extent that the department has provided study material, teaching material, annual teaching plan and also organised support workshops for them. Although that was the case, some schools (2, 3 and 5) are still experiencing some shortages in terms of teaching materials as they go to the neighbouring schools for support. Though there was support that was given by the Department of Education to Life Orientation, it is still inadequate as it could not cater for all the needs of the schools. In addition, the challenges faced by the above mentioned schools may also result in the provision of unbalanced LO curriculum implementation. Support and monitoring is crucial aspect when it comes to implementation of a certain learning area especially when dealing with Life Orientation. This is an easy subject to deal with since it entails issues of life, therefore, whatever support that needs to be provided in future will be appreciated in order to the teachers to be able to implement the curriculum according to its expected standards.
- Full Text:
- Date Issued: 2014
An empirical application of the Tobin’s Q theory in housing investments in South Africa
- Authors: Sitima, Innocent
- Date: 2013
- Language: English
- Type: Thesis , Masters , M Com
- Identifier: vital:11474 , http://hdl.handle.net/10353/d1013581
- Description: This study examines the patterns in the housing investments in South Africa in an attempt to understand if the possibility of the Tobin Q can be used to interpret the patterns and trends in the South African residential investments. The study, in its quest to explore and expose this intermporal relationship, it makes use of the South African annual time series data from 1960- 2010. The data was computed in different economic and econometric analysis software for better and reliable output, depending on the different level econometric technique that is required and need to be captured by the study. The dynamic investment equation is estimated using general- to- specific ARDL approach to magnify this connection and trends. The study established that combined asset prices and the levels of residential investment affect the long run investment performance rather than the Tobin Q. In the short run the lagged values of the Q, Business investment and residential investments seemed to be influential driving forces of private investment in South Africa. Even if the capital reserves in South Africa seem to be healthy, there is always a dire call for policy to be geared in the direction of the accessibility of credit to guarantee a supplementary conducive investment climate.
- Full Text:
- Date Issued: 2013
- Authors: Sitima, Innocent
- Date: 2013
- Language: English
- Type: Thesis , Masters , M Com
- Identifier: vital:11474 , http://hdl.handle.net/10353/d1013581
- Description: This study examines the patterns in the housing investments in South Africa in an attempt to understand if the possibility of the Tobin Q can be used to interpret the patterns and trends in the South African residential investments. The study, in its quest to explore and expose this intermporal relationship, it makes use of the South African annual time series data from 1960- 2010. The data was computed in different economic and econometric analysis software for better and reliable output, depending on the different level econometric technique that is required and need to be captured by the study. The dynamic investment equation is estimated using general- to- specific ARDL approach to magnify this connection and trends. The study established that combined asset prices and the levels of residential investment affect the long run investment performance rather than the Tobin Q. In the short run the lagged values of the Q, Business investment and residential investments seemed to be influential driving forces of private investment in South Africa. Even if the capital reserves in South Africa seem to be healthy, there is always a dire call for policy to be geared in the direction of the accessibility of credit to guarantee a supplementary conducive investment climate.
- Full Text:
- Date Issued: 2013
Financial structure and economic growth nexus: comparisons of banks, financial markets and economic growth in South Africa
- Authors: Godza, Praise G
- Date: 2013
- Language: English
- Type: Thesis , Masters , M Com
- Identifier: http://hdl.handle.net/10353/921 , vital:26509
- Description: The importance of the financial structure system, which comprises the banking sector and financial markets, to the growth of a country’s economy cannot be underestimated. It is important to analyse comparatively the contribution of each sector to the economic growth of a country. This study, therefore, empirically examined the relationship between financial markets, banks and economic growth in South Africa using time series analysis for the period 1990 to 2011. The study used the Vector Error Correction model (VECM) based causality tests to establish the link between financial structure (represented by both banks and financial markets) and economic growth. Real GDP was used as a measure for economic growth, Bank credit to the private sector was used as a proxy for the banking system, turnover ratio and value of shares traded was used as a measure for the stock market and bond market capitalisation was used as a measure for the bond market. To determine the net effects of financial structure on long run growth in South Africa, one control variable was added which was the ratio of government expenditure to GDP to control for the government’s role in the economy. The Johansen co-integration technique was also employed to obtain a long run relationship. The results from the study revealed that the stock turnover ratio, bond market capitalisation, and government expenditure have a long run relationship with economic growth while bank credit to private sector and value of shares traded showed a negative relationship with economic growth. With granger causality all the variables proved to granger cause economic growth except for bond market capitalisation where economic growth prove to granger cause bond market development. The study recommended that measures to improve liquidity, transparency and accessibility of both the banking sector and financial markets instruments should be a priority for South African authorities. The authorities should, therefore, encourage stock market development through an appropriate mix of taxes, legal and regulatory policies to remove barriers to stock market operations and thus enhance their efficiency since stock markets in Africa are underdeveloped. Strong financial regulation and supervision in banks to ensure efficiency in credit allocation should be done to enable channelling of credits to capital development rather than consumption spending.
- Full Text:
- Date Issued: 2013
- Authors: Godza, Praise G
- Date: 2013
- Language: English
- Type: Thesis , Masters , M Com
- Identifier: http://hdl.handle.net/10353/921 , vital:26509
- Description: The importance of the financial structure system, which comprises the banking sector and financial markets, to the growth of a country’s economy cannot be underestimated. It is important to analyse comparatively the contribution of each sector to the economic growth of a country. This study, therefore, empirically examined the relationship between financial markets, banks and economic growth in South Africa using time series analysis for the period 1990 to 2011. The study used the Vector Error Correction model (VECM) based causality tests to establish the link between financial structure (represented by both banks and financial markets) and economic growth. Real GDP was used as a measure for economic growth, Bank credit to the private sector was used as a proxy for the banking system, turnover ratio and value of shares traded was used as a measure for the stock market and bond market capitalisation was used as a measure for the bond market. To determine the net effects of financial structure on long run growth in South Africa, one control variable was added which was the ratio of government expenditure to GDP to control for the government’s role in the economy. The Johansen co-integration technique was also employed to obtain a long run relationship. The results from the study revealed that the stock turnover ratio, bond market capitalisation, and government expenditure have a long run relationship with economic growth while bank credit to private sector and value of shares traded showed a negative relationship with economic growth. With granger causality all the variables proved to granger cause economic growth except for bond market capitalisation where economic growth prove to granger cause bond market development. The study recommended that measures to improve liquidity, transparency and accessibility of both the banking sector and financial markets instruments should be a priority for South African authorities. The authorities should, therefore, encourage stock market development through an appropriate mix of taxes, legal and regulatory policies to remove barriers to stock market operations and thus enhance their efficiency since stock markets in Africa are underdeveloped. Strong financial regulation and supervision in banks to ensure efficiency in credit allocation should be done to enable channelling of credits to capital development rather than consumption spending.
- Full Text:
- Date Issued: 2013
The impact of missionary activities and the establishment of Victoria East, 1824-1860
- Maxengana, Nomalungisa Sylvia
- Authors: Maxengana, Nomalungisa Sylvia
- Date: 2012
- Subjects: Missionaries -- South Africa -- Eastern Cape -- History , Christianity and culture -- South Africa -- Eastern Cape , Christianity and other religions -- African -- Eastern Cape -- History , Xhosa (African people) -- Religious life , Eastern Cape -- Politics and Government -- Alice (South Africa)
- Language: English
- Type: Thesis , Masters , MA (History)
- Identifier: vital:11539 , http://hdl.handle.net/10353/d1006292 , Missionaries -- South Africa -- Eastern Cape -- History , Christianity and culture -- South Africa -- Eastern Cape , Christianity and other religions -- African -- Eastern Cape -- History , Xhosa (African people) -- Religious life , Eastern Cape -- Politics and Government -- Alice (South Africa)
- Description: This thesis covers a period of drastic change in that part of Xhosaland later known as Victoria East. Chapters one and two deal with the clash between the Glasgow missionaries at Lovedale and the amaXhosa who were expected to simply discard their way of life in favour of the new dispensation. Chapter three explains the arrival in the Eastern Cape of the amaMfengu, formerly called abaMbo, and their role in the divisive policies of the colonial government. Chapter four recounts the brief interlude (1836-1846) during which the colonial government tried but ultimately rejected a more equitable model of cross-border relations known as the Treaty System. The final chapter deals with the introduction of direct rule over the newly-created district of Victoria East, and with the policies of Henry Calderwood, its first magistrate, which were artfully constructed to perpetuate ‘Divide and Rule’ so as to maintain a comfortable life for the white settlers in the border area.
- Full Text:
- Date Issued: 2012
- Authors: Maxengana, Nomalungisa Sylvia
- Date: 2012
- Subjects: Missionaries -- South Africa -- Eastern Cape -- History , Christianity and culture -- South Africa -- Eastern Cape , Christianity and other religions -- African -- Eastern Cape -- History , Xhosa (African people) -- Religious life , Eastern Cape -- Politics and Government -- Alice (South Africa)
- Language: English
- Type: Thesis , Masters , MA (History)
- Identifier: vital:11539 , http://hdl.handle.net/10353/d1006292 , Missionaries -- South Africa -- Eastern Cape -- History , Christianity and culture -- South Africa -- Eastern Cape , Christianity and other religions -- African -- Eastern Cape -- History , Xhosa (African people) -- Religious life , Eastern Cape -- Politics and Government -- Alice (South Africa)
- Description: This thesis covers a period of drastic change in that part of Xhosaland later known as Victoria East. Chapters one and two deal with the clash between the Glasgow missionaries at Lovedale and the amaXhosa who were expected to simply discard their way of life in favour of the new dispensation. Chapter three explains the arrival in the Eastern Cape of the amaMfengu, formerly called abaMbo, and their role in the divisive policies of the colonial government. Chapter four recounts the brief interlude (1836-1846) during which the colonial government tried but ultimately rejected a more equitable model of cross-border relations known as the Treaty System. The final chapter deals with the introduction of direct rule over the newly-created district of Victoria East, and with the policies of Henry Calderwood, its first magistrate, which were artfully constructed to perpetuate ‘Divide and Rule’ so as to maintain a comfortable life for the white settlers in the border area.
- Full Text:
- Date Issued: 2012
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