1206710-34-0Relevant articles and documents
Intramolecular chalcogen - Tin interactions in [(o-MeEC6H 4)CH2]2SnPh2-nCln (E = S, O, CH2; n = 0, 1, 2) and intermodular chlorine - Tin interactions in the meta- and para-methoxy isomers
Vargas-Pineda, Diana Gabriela,Guardado, Tanya,Cervantes-Lee, Francisco,Metta-Magana, Alejandro J.,Pannell, Keith H.
, p. 960 - 968 (2010/04/28)
Organotin(IV) compounds of the type [(o-MeEC6H 4)CH2]2SnPh2-nCln were synthesized, E = O, n = 0 (1), n = 1 (2), and n = 2 (3); E = S, n = 0 (4), n = 1 (5), and n = 2 (6); and E = CH2, D = O (7), n = 1 (8), and n = 2 (9). The dichloro compounds 3 and 6 have been investigated by single-crystal X-ray diffraction and exhibit bicapped tetrahedral geometry at the tin atom as a consequence of significant intramolecular Sn ... -O (3) and Sn ... S (6) secondary bonding, in monomolecular units. Compound 3, when crystallized from a hexane/THF solvent mixture, shows two different conformers, 3' and 3", in the crystal structure; 3' has two equivalent Sn ... O interactions, while 3" has two nonequivalent Sn ... O interactions. Upon the recrystallization of 3 from hexane, only a single structural form is observed, 3'. The Sn ... E distances in 3', 3", and 6 are 71.3, 73.5 and 72.9, and 76.3% of the ΣvdW radii, respectively. The meta- and para-substituted isomers of 3 (10,.11) exhibit a distortion at the tin atom due to selfassociation via intermolecular Sn ...Cl interactions, resulting in polymeric structures. 119Sn NMR spectroscopy suggests that the intramolecular Sn ... E interactions persist in solution for the dichloride compounds 3 and 6.
