title: The effect of trifluoromethyl groups in the para positions of a perfluoroaryl phosphine: A comparison of the structures of [{η⁵,κP-C₅Me₄CH₂C₆F₃X-5-P(C₆F₄X-4)-2-CH₂P(C₆F₄X-4)₂}RhCl₂], X = F and CF₃

authors: Saunders, Graham C.

subjects: Bis{bis(4-trifluoromethyltetrafluorophenyl)}phosphino}methane

abstract: The complex [{η⁵,κP-C₅Me₄CH₂C₆F₃CF₃-5-P(C₆F₄CF₃-4)-2-CH₂P(C₆F₄CF₃-4)₂}RhCl₂] (2) was formed by dehydrofluorinative carbon–carbon coupling in the reaction between bis{bis(4-trifluoromethyltetrafluorophenyl)phosphino}methane and [(η⁵-C₅Me₅)RhCl(μ-Cl)]₂. The structure of 2 has been determined by single crystal X-ray diffraction and compared to that of the pentafluorophenyl analogue [{η⁵,κP-C₅Me₄CH₂C₆F₄P(C₆F₅)-2-CH₂P(C₆F₅)₂}RhCl₂] (3). The presence of the trifluoromethyl groups, although not affecting the local structure about rhodium, disrupts the packing and consequently the structure of the two complexes is very different. The structure of 2 contains channels about 3-fold axes comprising fluoroaryl cavities separated by aliphatic constrictions arising from hexagonal rings of alternating enantiomers.

text: The effect of trifluoromethyl groups in the para positions of a perfluoroaryl phosphine: A comparison of the structures of [{η⁵,κP-C₅Me₄CH₂C₆F₃X-5-P(C₆F₄X-4)-2-CH₂P(C₆F₄X-4)₂}RhCl₂], X = F and CF₃ The complex [{η⁵,κP-C₅Me₄CH₂C₆F₃CF₃-5-P(C₆F₄CF₃-4)-2-CH₂P(C₆F₄CF₃-4)₂}RhCl₂] (2) was formed by dehydrofluorinative carbon–carbon coupling in the reaction between bis{bis(4-trifluoromethyltetrafluorophenyl)phosphino}methane and [(η⁵-C₅Me₅)RhCl(μ-Cl)]₂. The structure of 2 has been determined by single crystal X-ray diffraction and compared to that of the pentafluorophenyl analogue [{η⁵,κP-C₅Me₄CH₂C₆F₄P(C₆F₅)-2-CH₂P(C₆F₅)₂}RhCl₂] (3). The presence of the trifluoromethyl groups, although not affecting the local structure about rhodium, disrupts the packing and consequently the structure of the two complexes is very different. The structure of 2 contains channels about 3-fold axes comprising fluoroaryl cavities separated by aliphatic constrictions arising from hexagonal rings of alternating enantiomers.

year: 2010

title: Cross-sectional and time-series momentum returns and market states

authors: Cheema, Muhammad A.

subjects: momentum returns

abstract: Recent evidence on momentum returns shows that the time-series (TS) strategy outperforms the cross-sectional (CS) strategy. We present new evidence that this happens only when the market continues in the same state, UP or DOWN. In fact, we find that the TS strategy underperforms the CS strategy when the market transitions to a different state. Our results also show that the difference in momentum returns between TS and CS strategies is related to both the net long and net short positions of the TS strategy.

text: Cross-sectional and time-series momentum returns and market states Recent evidence on momentum returns shows that the time-series (TS) strategy outperforms the cross-sectional (CS) strategy. We present new evidence that this happens only when the market continues in the same state, UP or DOWN. In fact, we find that the TS strategy underperforms the CS strategy when the market transitions to a different state. Our results also show that the difference in momentum returns between TS and CS strategies is related to both the net long and net short positions of the TS strategy.

year: 2017

title: The Role of Fatherhood in the Everyday Life of Young Māori Men

authors: Elkington, Angus Marangai Brons

subjects: maori men

abstract: Little research exists that explores the positive aspects of young Māori fathers. The aim of this study was to explore the everyday lived reality of expectant and young Māori males as fathers and partners, within the context of a positive based approach and Kaupapa Māori research framework. A secondary objective of this study was to provide ideas to enhance parent resources for young Māori fathers, such as father centric parenting programmes and mobile applications. The research was derived from semi-structured interviews, which explored the unique experiences and narratives of eight young Māori fathers between the age of 16 and 25 years of age. Using thematic analysis, the findings were categorised into key themes that portrayed their perception and attitudes to roles, responsibility, relationships, barriers, and wellbeing strategies. The findings identified, a strong desire of young Māori fathers to be involved with their children and that the quality of whānau relationships provided resilience, support, and motivation to fulfil the responsibilities of fatherhood. The young Māori fathers had strong goals and aspirations but acknowledged barriers that delayed their ability to achieve them. In the outcome of this study, I have tried to portray a positive understanding of young Māori fathers and to challenge the negative stereotypes that persist in New Zealand society. Furthermore, this research supports the need for restorative cultural practices as the key to wellbeing for our whānau and further investigations in regards to policy reforms and resources to include full participation in society.

text: The Role of Fatherhood in the Everyday Life of Young Māori Men Little research exists that explores the positive aspects of young Māori fathers. The aim of this study was to explore the everyday lived reality of expectant and young Māori males as fathers and partners, within the context of a positive based approach and Kaupapa Māori research framework. A secondary objective of this study was to provide ideas to enhance parent resources for young Māori fathers, such as father centric parenting programmes and mobile applications. The research was derived from semi-structured interviews, which explored the unique experiences and narratives of eight young Māori fathers between the age of 16 and 25 years of age. Using thematic analysis, the findings were categorised into key themes that portrayed their perception and attitudes to roles, responsibility, relationships, barriers, and wellbeing strategies. The findings identified, a strong desire of young Māori fathers to be involved with their children and that the quality of whānau relationships provided resilience, support, and motivation to fulfil the responsibilities of fatherhood. The young Māori fathers had strong goals and aspirations but acknowledged barriers that delayed their ability to achieve them. In the outcome of this study, I have tried to portray a positive understanding of young Māori fathers and to challenge the negative stereotypes that persist in New Zealand society. Furthermore, this research supports the need for restorative cultural practices as the key to wellbeing for our whānau and further investigations in regards to policy reforms and resources to include full participation in society.

year: 2016