Tri- and di-arylantimony(V) thiocyanates and mixed halide thiocyanates; crystal structure of triphenylantimony(V) di-isothiocyanate

New square-pyramidal organoantimony(V) compounds; crystal structures of (biphenyl-2,2′-diyl)phenylantimony(V) dibromide, dichloride and diisothiocyanate, Sb(2,2′-C12H8)PhX2 (X = Br, Cl or NCS), and of octahedral SbPh(o-O2C6Cl4)Cl2 ·OEt2

“…23 The sharp, intense band at 2077 cm Ϫ1 is in a region usually associated with either 1,3 bridging or terminal S-bonding; the latter assignment is however unlikely here as hard Sb V has a distinct preference for N-bonding. 24 The second, broad band at 1994 cm Ϫ1 is similar to that found for SbPh 3 (NCS) 2 (2009 cm Ϫ1 ) and is consistent with terminal N-bonding. A further band at 743 cm Ϫ1 is assigned to C᎐S stretching and a deformation mode occurs at 450 cm Ϫ1 .…”

“…A further band at 743 cm Ϫ1 is assigned to C᎐S stretching and a deformation mode occurs at 450 cm Ϫ1 . The C᎐N stretching region is, in fact, very similar to that for SbPh 2 Br(NCS) 2 , 24 where bands at 2092 and 1993 cm Ϫ1 were interpreted as suggesting a dimeric (or more highly polymeric) structure with antimony bonded to one terminal and one bridging thiocyanate group. Similar di-or polymeric structures are clearly possibilities for 5 and, as halogens are also potential bridging groups, for 2-4 also.…”

“…) 165.4(5) * Atoms carrying a prime are related to unprimed atoms by the symmetry operation 1 Ϫ x, Ϫy, Ϫz. [Sb(1)᎐N(200) 2.146(4), Sb(1)᎐N(100) 2.216(4) Å], presumably a consequence of bridging with the terminal separation comparable to those in SbPh 3 (NCS) 2 (mean 2.142 Å) 24. Bridging also leads to an increase in the C᎐S separation [C(100)᎐S(100) 1.639(5), C(200)᎐S(200) 1.601(6) Å], but both groups, as expected, are effectively linear with angles at C(100) and C(200) of 179.3(4) and 178.0(5)Њ, respectively.…”

An Organobismuth Compound that Exhibits Selective Cytotoxicity to Vascular Endothelial Cells in Vitro

“…Compounds 05, 06, 28, and 29 were prepared by the reaction of SbCl 3 were synthesized as described previously. [8][9][10][11][12][13][14][15][16][17][18][19][20][21] The lactate dehydrogenase (LDH) kit, bismuth nitrate, and other reagents were from Wako Pure Chemical Industries (Osaka, Japan). Cytotoxicity Assay ---Vascular endothelial cells, vascular smooth muscle cells, LLC-PK 1 cells, and IMR-90 cells were each cultured in DMEM supplemented with 10% FBS in 24-well culture plates at 37°C in a humid atmosphere of 5% CO 2 in air until confluence.…”