Nitrogen-Coordinated Products

A series of dimethyl Group IVA dicyano products were studied. The sUicon and germanium compoimds are approximately tetrahedral, forming linear chains through weak acid-base N-metal interactions. The tin and lead products show similar structures but with stronger N-Pb interactions. Planer sheets are formed where 

The crystal structure of trimethyllead azide, Me3PbN3, was studied. The lead atom is connected to the terminal nitrogen of the azido group, forming zigzag structures as in 8. The lead atoms exist as an almost perfect trigonal bipyramidal coordination sphere with the trimethyllead units ordered in a skew conformation. 

Mixed-metal cobalt-lead products of the formulas [(Me3Pb)3M(CN)g] (where M=Fe, Co and [(Me3Pb)4M(CN)6] , where M=Fe, Ru have been formed through addition of a saturated aqueous solution of Me3PbCl to concentrated solutions of 

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Lithiation of the conformationally constrained ferrocenyloxazoline 308 (Scheme 142) provided useful information about the mechanism by which lithiation of 305 achieves diastereoselectivity . The product 310 must have arisen from an organolithium 309 in which the oxazoline nitrogen coordinates to the hthium (Scheme 142). It is likely that... 

Coordinated azide ion will undergo a number of reactions which involve attack at the azide ligand. A number of examples are summarized in Scheme 9.1172-1175 The azide ligand is photochemically dissociated from bis azide complexes. Irradiation of Pt(CN)4(N3) gives Pt(CN)4 and the azide radical (equation 366),1176 whereas with Pt(N3)2(PPh3)2 the nitrogen-containing product is believed to be N6 (equation 367).1177... 

Nitrogen-coordinated pentacoordinate complexes have been used as stereoselective reducing agents in the preparation of erythro-(meso)- 1,2-diols from diketones and a-hydroxyketones109. The reducing agent was the (l-naphthylamino-8)trihydridosilane 92e. After formation of the dioxo chelate from the diketone (equation 32), the diol was obtained from the pentacoordinate silicon complex by reduction with LiAlILt. 29 Si NMR spectroscopy was used for the product-ratio analysis in this reaction, which was found to yield primarily the erythro diols. 

Shabati Y, Wang DI. Production of emulsan in a fermentation process using soybean oil (SBO) in a carbon-nitrogen coordinated feed. Bioetchnol Bioeng 1990 35 753-65. 

Although ZMBT and ZDC are only sparingly soluble in rubber, coordination products with nitrogen bases (either naturally occurring in the rubber or deliberately added) or with zinc carboxylates are very soluble. A typical ligand complex is the product (IV) ... 

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