13293-57-7Relevant articles and documents
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Kolosova et al.
, (1976)
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Structural studies of diorganotin(IV) carboxylates. X-ray and NMR structures of Me2Sn(OAc)2 and a 7-coordinate tin anion, Me2Sn(OAc)3-NMe4 +·2CHCl3
Lockhart, Thomas P.,Calabrese, Joseph C.,Davidson, Fredric
, p. 2479 - 2483 (2008/10/08)
The X-ray crystal and molecular structure of Me2Sn(OAc)2 is reported and compared with previous predictions based on other structural methods. The molecule is found to be monomeric and 6-coordinate at tin in the solid state. The Me-Sn-Me angle of 135.9 (2)° is in close agreement with the value predicted from solid-state and solution NMR studies. 119Sn NMR data are also reported for this compound. Me2Sn(OAc)2 crystallizes in the monoclinic space group C2/c (No. 15) with a = 12.712 (2) A?, b = 5.220 (1) A?, c = 14.365 (3) A?, β = 92.80 (1)°, and Z and 4; R refined to 0.022 and Rw to 0.029 for 1041 reflections. Me2Sn(OAc)2 reacts with Me4N+OAc- in CHCl3 solution to give a quantitative yield of Me2Sn(OAc)3-NMe4+. Me2Sn(OAc)3-NMe4+ crystallizes with two molecules of CHCl3 in orthorhombic space group Pbca (No. 61) with a = 16.717 (2) A?, b = 17.475 (2) A?, c = 18.242 (3) A?, and Z = 8; R refined to 0.059 and Rw to 0.047 for 1723 reflections. Me2Sn(OAc)3-NMe4+ is 7-coordinate at tin and has a Me-Sn-Me angle of 165.8°. CHCl3 in the crystal lattice is weakly hydrogen bonded to several oxygens of the tin complex. Solution 1H, 13C, and 119Sn and solid-state 13C NMR studies provide evidence for retention of the high coordination number in solution and for rapid, reversible acetate exchange in solution.
