Imine oximes metal complexes

Osmium, quinuclidinetetraoxime-stereochemistry, 44 Osmium, tetrachloronitrido-tetraphenylarsenate stereochemistry, 44 Osmium, tris( 1,10-phenanthroline) -structure, 64 Osmium(II) complexes polymerization electrochemistry, 488 Osmium(III) complexes magnetic behavior, 273 Osmium(lV) complexes magnetic behavior, 272 Osmium(V) complexes magnetic behavior, 272 Osmium(VI) complexes magnetic behavior, 272 Oxaloacetic acid decarboxylation metal complexes, 427 Oxamidoxime in gravimetry, 533 Oxidation-reduction potentials non-aqueous solvents, 27 Oxidation state nomenclature, 120 Oxidative addition reactions, 282 Oxidative dehydrogenation coordinated imines, 455 Oximes... 

However, when bound to a higher metal oxidation state center, with a limited tt-electron donor ability, the nitriles display v (N C) higher than in the free state and can be activated toward nucleophilic attack, as observed for the reactions of cfr-[ReCLi(NCMe)2] (formed by spontaneous reduction of ReCls in NCMe) with oximes, HON=CRR, amino-alkylated adenines, or alcohols, which behave as protic nucleophiles (reaction 2) to yield, for example, in the flrst case, the imine complexes cA-[ReCl4 NH=C(Me)ON=CRR 2]. 

The reactions can either be centered at any of the atoms of the CNO moiety (Scheme 3), where the substituent groups are omitted for clarity), leading to oxime (or oximate), imine or other types of complexes (in some cases with metallacycles and in others with formation of unsaturated organic N,0-products) or occur at another part of the oxime molecule. In fact, coordination does not always lead to the activation of the oxime functional group, but instead a protecting effect can result as observed (see Section 1.29.3.6) in the chlorination of some salicylaldoxime Pt11 complexes which occurs exclusively at the metal and at the benzene ring (ortho and para positions) of the oxime in contrast with the known reactivity of free oximes. 

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