90388-87-7Relevant academic research and scientific papers
A M?ssbauer and single-crystal x-ray structural study of hexa- and pentacoordinate organotin(IV) compounds containing urea-type derivatives
Calogero, Sandro,Valle, Giovanni,Russo, Umberto
, p. 1205 - 1210 (2008/10/08)
A number of hexa- and pentacoordinate diorganotin(IV) complexes of general formulae R2SnCl2-2L and R2SnCl2·L (R = Me or Ph; L = urea or thiourea-type ligand) together with Ph3SnCl·tmtu (tmtu = tetramethylthiourea) have been prepared and characterized by infrared and by Mo?ssbauer spectroscopy. The crystal structures of Me2SnCl2·2dmtu (dmtu = 1,3-dimethylthiourea), C8H22N4S2Cl2Sn (1), Ph2SnCl2·2dmtu, C18H26N4S2Cl2Sn (2), and Ph3SnCl-tmu (tmu = tetramethylurea), C23H27N2OClSn (3), solved by X-ray analysis are reported. 1 and 2 crystallize in the monoclinic system of space group P21/n. 1: a = 9.843 (3) A?, b = 9.864 (3) A?, c = 9.089 (3) A?, β = 100.1 (4)°, Z = 2. 2: a = 10.791 (3) A?, b = 11.468 (4) A?, c = 10.147 (4) A?, β = 93.9 (3)°, Z = 2. Both compounds consist of discrete molecules with nearly regular trans-octahedral tin(IV) coordination and the following bond lengths: Sn-S = 2.729 (1) and 2.686 (2) A?, Sn-C = 2.122 (5) and 2.151 (7) A?, and Sn-Cl = 2.616 (1) and 2.589 (2) A? for 1 and 2, respectively. 3 crystallizes in the orthorhombic system of space group Pcab (no. 61) with a = 29.977 (9) A?, b = 14.235 (5) A?, c = 11.034 (4) A?, and Z = 8. The lattice of 3 contains discrete molecules with tin having a distorted trigonal-bipyramidal geometry with the following bond lengths: Sn-Ceq = 2.12 (1), 2.15 (1), and 2.11 (1) A?, Sn-Clap = 2.485 (4) A?, and Sn-Oap = 2.383 (8) A?.
