Coordination chemistry, organotin

Since the dominant higher-coordination chemistry is that of tin, we survey this first. The range of structural studies is so wide that it is possible only to generalize and look at recent and representative examples. Intramolecular coordination in organotin compounds has been extensively reviewed up to 1992113. 

Pettinari C, Marchetti F, Pettinari R, Cingolani A, Drozdov A, Troyanov S (2002) Coordination chemistry of bis(pyrazolones) a rational design of nuclearity tailored polynuclear complexes. Part 2. The interaction of organotin(IV) acceptors with 1, 4-bis(5-hydroxy-l-phenyl-3-methyl-lH-pyrazol-4-yl)butane-l, 4-dione. J Chem Soc Dalton Trans 2 188-194... 

Hypervalent compounds are common in the case of lead, rather than the tetrahedral ones ". However, the coordination chemistry of hypervalent lead compounds has been much less studied than that of hypervalent organotin compounds, probably due to the well-known high toxicity of organolead derivatives. The progressive lowering of the three-center interaction for the group 14 column of the Periodic Table and the marked drop for lead can be accounted for in terms of the relativistic effect. ... 

J. T. B. H. Jastrzebski, Intramolecular Coordination in Organotin Chemistry, Ph.D. Thesis, University of Utrecht, Netherlands, 1991. 

Two-dimensional H- Sn Proton Detected Correlation Spectroscopy in Coordination Chemistry of Hypervalent Organotin Compounds... 

Little has been reported yet on the coordination chemistry of mono-organotin compounds. Coordination numbers of five to eight for the tin atom have been reported in such compounds (39,50,51). It has been suggested, however, that in solution a trigonal bipyramidal arrangement at tin is the most favorable one (49). 

The coordination chemistry of divalent organotin compounds is a special case, since the tin atom can act both as an acceptor and as a donor, e.g., as in (CO)3CrSn(f-Bu)2 pyridine (52). 

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