Organolead compounds structure

See introductory remarks in Section I.A.2 of Chapter 7. Table 4 summarizes examples published in the recent literature, with brief comments about structural features of organolead compounds. 

TABLE 3. Structural determination of organolead compounds by NMR spectroscopy... 

Organolead compounds comprise the broad class of structures that are characterized by at least one carbon atom bonded directly to a lead atom. 

Figure 26 continued. Model structures of organolead compounds. The model structure of the humic substance is adapted from Morel (1983). 

More lead-containing supramolecular self-assembled structures with soft donors can be expected, but the interest in toxic organolead compounds is currently rather limited. 

During the past few years the interests of research chemists have shifted more toward questions of the theory of bonding and structure, the mechanisms of known reactions, and the evaluation of new reaction possibilities. Previously known organolead compounds, as for instance those with Pb—0 groups, were suddenly found to have many new uses as reaction... 

There is much less information on the formation of organo-metallic compounds in electrochemical reduction of aldehydes. Low [15] observed the formation of an organolead compound in the electrochemical reduction of citral but did not study its structure. Organolead compounds which have been obtained by electrolysis of certain other aldehydes [16,17] have also not been investigated. 

Early examples of structurally characterised organolead coordination polymers with Pb—N interactions are trimethyllead cyanide, Me3PbCN335, dimethyllead dicyanide, Me2Pb(CN)2337, and trimethyllead azide, Me3PbN3 (179)467,468. The latter compound forms a linear chain polymer with a /X2-N atom symmetrically bridging the pentacoordinated lead centres [Pb—N 2.54(1) A], The N—Pb—N angle [178.6(5)°] deviates only slightly from the ideal value of 180°. 

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