Tin n Halides

Metals.—Monosubstituted cyclopropanes can displace ethylene from [PtCl2(C2H4)]2 to give the metal-inserted complexes (23). The relative reactivities of the cyclopropanes vary in the order R = n-CgHis PhCH2 Ph  

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A tin-organomagnesium halide compound forms as an intermediate when Me Snj is reacted with other RgSnj compounds (R = Et, n-Pr, n-Bu, i-Bu) in tetrahydrofuran (THF) or MeCN in presence of an MeMgBr catalysis ... 

Tin(n) iodide is a less commonly encountered compound than other tin halides such as tin(II) fluoride, tin(II) chloride, or tin(lV) iodide. Although Snl2 has a simple stoichiometry, its chemical stracture is rather complex. Pale yellow acidic aqueous solutions of Snl2 afford brilliant red-orange crystals that contain an extended array in which some tin(ll) ions arc surrounded by six iodide anions, and others by seven. In the gas phase or in solution, monomeric tin(ll) halides are... 

With six outer shell electrons the tin(II) halides can be expected to be monofunctional acceptors to complete a valence shell. Whilst this accounts for the many 1 1 complexes in Table 12, it cannot be an explanation for other well-characterized stoichiometries. Whilst many of these other stoichiometries may be analogous to SnCl2.2H20, in which one water molecule is coordinated and the other is only lattice water, it cannot be ruled out that in certain cases tin may use vacant d orbitals to form these SnCl2.(base) complexes, where n > 1. 

Other heteropolynuclear gold(II) complex that can be obtained by replacement of halide groups in bis(ylide)gold(II) species by other anionic nucleophilic metal complex is the tin derivative [Au2 Sn[N(p-Tol)SiMe2]3SiMe 2 M-(CH2)2PPh2 2] (350).2041... 

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