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Durham e-Theses
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Studies on imino, amidino and related derivatives of some main group elements

Manning, Kenneth (1980) Studies on imino, amidino and related derivatives of some main group elements. Doctoral thesis, Durham University.



This thesis describes studies on the co-ordination chemistry of Group II elements, magnesium and zinc, and Group IV elements silicon, germanium and tin. Attention is focussed principally on systems with ligands containing multiple-bonded nitrigen attached t, these Groups II and IV elements viz., Ketimino and amidin, derivatives containing R(_2)C=N and R(^1)NC(R)=NR(^1) ligands respectively. After an introductory survey of the relevant chemistry, Chapter 2 describes studies on fifteen ketiminomagnesium derivatives of formula types (R(_2)C=NMgBr)(_2)(L)(_x), [(R(_2)C=N)(_2)Mg](_n)(THF)(_x), (R(_2)C=NMgX)(_n)L(_m) and includes an X-ray crystal structure of (Ph(_2)C=NMgBr)(_2)(THF)(_3). All compounds described are associated species, often dimeric, and are believed to co-ordinate via bridging methyleneamino ligands with additional bridging ligands (OEt(_2), THF and TMED) in some cases. Where compounds also contain terminally attached methyleneamino ligands, their infrared spectra are consistent with linear C=N-Mg units. Chapter 3 describes related studies on ten methylene- aminozinc compounds of formula types (R(_2)C=NH)(_x)ZnX(_2), R = Ph, p-tolyl, X=C1, X = 2; R=Bu(^t), X = 1, x = 1; R= p-tolyl, X = Ph, X = 1; RCN.ZnPh(_2) (R = p-tolyl); (R(_1)R(_2)C=NZnX)(_n),= R(_2) = p-tolyl, X = Ph, n = 2; R(_2) = Eg = p-tolyl, X = Ph, n = 2; R(_1) = Ph, R(_2) = p-tolyl, X = Ph, n = 2; R(_1) = R(_2) = p-tolyl, X = (p-tolyl)(_2)C=N, The associated species are thought to have bridging methyleneamino units with three-co-ordinate zinc.

Item Type:Thesis (Doctoral)
Award:Doctor of Philosophy
Thesis Date:1980
Copyright:Copyright of this thesis is held by the author
Deposited On:16 Jul 2013 10:56

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