Tin-metal bonds

Survival of the ions is assisted by the solvent. Complexes with bridging tin atoms, and mixed complexes, are particularly interesting. Oxidation of the latter is followed by cleavage of either of the tin-metal bonds as in the following example ... 

Acetyl migration occurs in the reaction of Tl(MeCOCHCOMe) with Pms Pd(PhCN)2Cl2, which yields an A-acetyl-jS-ketoimine chelate (17).471 Mossbauer data indicate that Sn(MeCOCHCOMe)2 has a trigonal pyramidal geometry with one oxygen atom from each acetylacetonate ligand in an axial position.472 The equatorial lone electron pair is both stereochemically and chemically active. Complexes in which the metal acts as the donor rather than the acceptor are formed by photolysis of Sn(MeCOCHCOMe)2 and Group VI metal hexacarbonyls in THF. The products, Sn(MeCOCHCOMe)2M(CO)5 (M = Cr, Mo, W), evidently contain tin-metal bonds. The low... 

XXXV. Compounds containing a tin—metal bond (a) Sn-Sn, Sn-Si, and Sn-Li bonds ... 

The first stannatrane containing a tin-metal bond, the osmium derivative 450, was synthesized from TEAA and a triiodostannyl osmium complex (Scheme 20)878. 

Triorganotin salts of general formula [R3Sn] A+, A = alkali metal, are readily obtained from the reaction of the corresponding chlorotin compounds with the alkali metal. Reaction of these compounds with transition-metal halides is thus another useful salt-elimination reaction for the formation of tin-metal bonds. A representative selection of such reactions is illustrated in equation 72 -7448,49,232. 

The well-established reducing properties of the Sn—H bond have led to a number of useful synthetic methods for forming a tin-metal bond. In particular, many early transition-metal hydrides, -amides and -silanes readily eliminate H2/amines/silanes upon treatment with the Sn—H bond. Some examples are illustrated in equations 79-83 for... 

The elimination reaction between metal hydrides and tin halides is another useful route to the formation of the tin-metal bond (equations 90 and 91)243,244,294 p(lc presence of a base to remove the hydrogen halide is often necessary to prevent decomposition reactions. ... 

A113. H. M. J. C. Creemers, Hydrostannolysis. A General Method for Establishing Tin-Metal Bonds. Schotanus and Jens, Utrecht, 1967. 251 pp. 

P-Hydroxyalkyltin compounds can be prepared by the reaction of a tin-metal bonded compound I-FSn0 M0+ (M = Li,79 Na,80 or MgBr,81) with an epoxide, for example equation 6-33 79... 

With strong bases (RLi, LDA, NaH, KH, RMgX), deprotonation occurs to give tin-metal bonded products which provide a useful source of nucleophilic tin (Section 19.1).35-89-90... 

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