Download Comprehensive Coordination Chemistry Vol. 3: Main Group and by Geoffrey Wilkinson, Jon A. McCleverty, Robert D. Gillard PDF

By Geoffrey Wilkinson, Jon A. McCleverty, Robert D. Gillard

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Extra info for Comprehensive Coordination Chemistry Vol. 3: Main Group and Early Transition Metals (Vol 3)

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365,366 metal-ligand Bidentate and tridentate interactions with the cations occur and generally the structures are networks having multiple cation-anion interactions. 367The structure has two formula units in the asymmetric unit and can be viewed as being dimeric in origin. 56 ... 3H2O(reproduced with permission from reference 367) Alkali Metals and Group IIA Metals 35 sodium coordination; in the first two independent sodium cations Nal and Na2 are octahedrally coordinated. This is achieved by interaction with two ATP molecules, one of type A and one of type B.

The crystal structure of the mixed ligand species K(o-nitrophenolate)(isonitrosoacetophenone) is used as an illustration. 1 interactions). Each anion becomes involved in interactions with four cations, some donor atoms being shared. x Compounds similar to (61)and containing o-nitrophenol, acetylacetone, salicylaldehyde, efc. 17*18+19 They were referred to as ‘acid salts’ and their solubility in organic media was taken as a criterion of complexation. In historic terms they play an important role in the development of the area.

33 In the 'H NMR of complexes of podands with rigid terminal groups pronounced changes are seen in the splitting patterns of the aromatic region on complexation. The structure of (15d)RbI is in full accord with the upfield shift found for the heterocyclic terminal units. This area of study shows much promise for the future with the availability of multinuclear NMR techniques. Studies have also been made on the selectivity between metals, and on the stability of the complexes. Examples of the effects of loss of terminal group, the introduction of rigid ligand spines and the variation of the terminal group are shown in Figure 7.

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