title: Polymetallic Silyl-Iron and -Ruthenium Compounds

authors: Masters, Neville Kingston

subjects: Inorganic Polymers

abstract: The synthesis of iron and ruthenium compounds which contain either end-capped silyl units Fe-Si-Si-Fe or the linear sequence Si-Ru-Ru-Si respectively were explored.  
   		(I)			(II) 			          (III)

End-capped iron species, e.g. I, were prepared using literature methods and two new related iron containing silyl species II and III were synthesised.  These were prepared as model compounds for comparison with polymeric analogues.

 		 
	          (IV)					  (V)

Ruthenium silyl species of the type IV that maintain metal - metal bonding have been prepared.  As an extension to this work inorganic polymeric species such as V were synthesised using the same preparation techniques.

The polymeric compounds were difficult to characterise as they were unable to be chromatographed or crystallised therefore, all data was from crude mixtures.  Spectroscopic techniques involved FT - IR, ESMS, LDI-TOF and NMR spectroscopy.  ESMS was an ineffective technique for the polymeric compounds however, LDI-TOF mass spectrometry gave broad curves with an average molecular weight ranging from 60,000 to 200,000 for different preparations.

Flexible siloxanes such as HSiMe2OSiMe2OSiMe2H gave molecular cluster derivatives with bridging ligands rather than polymers.

text: Polymetallic Silyl-Iron and -Ruthenium Compounds The synthesis of iron and ruthenium compounds which contain either end-capped silyl units Fe-Si-Si-Fe or the linear sequence Si-Ru-Ru-Si respectively were explored.  
   		(I)			(II) 			          (III)

End-capped iron species, e.g. I, were prepared using literature methods and two new related iron containing silyl species II and III were synthesised.  These were prepared as model compounds for comparison with polymeric analogues.

 		 
	          (IV)					  (V)

Ruthenium silyl species of the type IV that maintain metal - metal bonding have been prepared.  As an extension to this work inorganic polymeric species such as V were synthesised using the same preparation techniques.

The polymeric compounds were difficult to characterise as they were unable to be chromatographed or crystallised therefore, all data was from crude mixtures.  Spectroscopic techniques involved FT - IR, ESMS, LDI-TOF and NMR spectroscopy.  ESMS was an ineffective technique for the polymeric compounds however, LDI-TOF mass spectrometry gave broad curves with an average molecular weight ranging from 60,000 to 200,000 for different preparations.

Flexible siloxanes such as HSiMe2OSiMe2OSiMe2H gave molecular cluster derivatives with bridging ligands rather than polymers.

year: 2010

title: Isolation and identification of pectenotoxins-13 and -14 from Dinophysis acuta in New Zealand

authors: Miles, Christopher O.

subjects: Dinophysis acuta

abstract: Two novel pectenotoxins (PTXs), PTX-13 and -14, were isolated from extracts of Dinophysis acuta collected from the west coast of South Island, New Zealand. The compounds were identified as oxidized analogues of PTX-2 by NMR spectroscopic and LC-MS studies. PTX-13 (32R-hydroxyPTX-2) corresponds to the unidentified analogue PTX-11x reported by [Suzuki et al., 2003. Liquid chromatography-mass spectrometry of spiroketal stereoisomers of pectenotoxins and the analysis of novel pectenotoxin isomers in the toxic dinoflagellate Dinophysis acuta from New Zealand. J. Chromatogr. A 992, 141–150]. PTX-13 underwent slow deuteration at the 13β-position during NMR analysis. PTX-14 corresponds to the 32,36-dehydration product of PTX-13, and may be an artifact.

text: Isolation and identification of pectenotoxins-13 and -14 from Dinophysis acuta in New Zealand Two novel pectenotoxins (PTXs), PTX-13 and -14, were isolated from extracts of Dinophysis acuta collected from the west coast of South Island, New Zealand. The compounds were identified as oxidized analogues of PTX-2 by NMR spectroscopic and LC-MS studies. PTX-13 (32R-hydroxyPTX-2) corresponds to the unidentified analogue PTX-11x reported by [Suzuki et al., 2003. Liquid chromatography-mass spectrometry of spiroketal stereoisomers of pectenotoxins and the analysis of novel pectenotoxin isomers in the toxic dinoflagellate Dinophysis acuta from New Zealand. J. Chromatogr. A 992, 141–150]. PTX-13 underwent slow deuteration at the 13β-position during NMR analysis. PTX-14 corresponds to the 32,36-dehydration product of PTX-13, and may be an artifact.

year: 2006-08

title: The Unmet Legal, Social and Cultural Needs of Māori with Disabilities

authors: Hickey, Susan Jane

subjects: Māori

abstract: There is little work done in the area of indigenous disability identity issues and how they are recognised in domestic and international human rights laws. The discourse of disability has always been based on social constructionism and without it, there is no identity. I discuss its relevance to indigenous (Māori) with disabilities and how the multiplicitous nature of the identity of  other  has a particular impact when indigenous, gender and disability are all identified from marginalised groups. I also explore the impact of westernised thinking around impairment, in particular the models of disabilities on indigenous well-being. The issues of family (whānau), whakawhanaungatanga (family relationships), interdependence (community) and collectivity identities central to indigenous thinking are largely ignored by law and policy, yet central to indigenous identity. This ignorance in policy has led to the disparities that continue to remain for indigenous persons with disabilities, particularly those from within thematic identity groups.

text: The Unmet Legal, Social and Cultural Needs of Māori with Disabilities There is little work done in the area of indigenous disability identity issues and how they are recognised in domestic and international human rights laws. The discourse of disability has always been based on social constructionism and without it, there is no identity. I discuss its relevance to indigenous (Māori) with disabilities and how the multiplicitous nature of the identity of  other  has a particular impact when indigenous, gender and disability are all identified from marginalised groups. I also explore the impact of westernised thinking around impairment, in particular the models of disabilities on indigenous well-being. The issues of family (whānau), whakawhanaungatanga (family relationships), interdependence (community) and collectivity identities central to indigenous thinking are largely ignored by law and policy, yet central to indigenous identity. This ignorance in policy has led to the disparities that continue to remain for indigenous persons with disabilities, particularly those from within thematic identity groups.

year: 2008