THE DIHYDROGENTRISULFANEDIPHOSPHONATE ION - PREPARATION AND CRYSTAL-STRUCTURES OF BAH2S3P2O6-CENTER-DOT-C2H5OH AND [CO(EN)2CL(H2O)]H2S3P2O6-CENTER-DOT-H2O

Barium dihydrogentrisulfanediphosphonate ethanol solvate, BaH2S3P2O6. C2H5OH (1), and trans-aquachlorobis(ethylenediamine)cobalt(III) dihydr ogentrisulfanediphosphonate monohydrate, [Co(en)2Cl(H2O)]H2S3P2O6.H2O (2), form triclinic crystals, space group P1BAR with Z = 2. Cell dimen sions are for 1, a = 5.809(1), b = 9.085(1), c = 12.168(1) angstrom, a lpha = 97.17(1), beta = 102.42(1), gamma = 104.40(1)-degrees, and for 2, a = 7.328(1), b = 9.892(1), c = 13.613(1) angstrom, alpha = 87.68(1 ), beta = 84.04(1), gamma = 69.33(1)-degrees. The structures have been determined by X-ray methods and refined to R = 0.036 (1) and 0.047 (2 ) for 2292 and 3791 observed reflections, respectively. The anions of both salts have cis rotameric forms with PSSS torsion angles in the ra nge 90.5-99.8-degrees. The dimensions of the anions are: S-S = 2.0344( 16)-2.0609(14) angstrom, S-P = 2.1047(13)-2.1223(14) angstrom, P-O = 1 .461(3)-1.573(3) angstrom, S-S-S = 108.13(8)-108.42(7)-degrees, S-S-P = 101.09(6)-104.45(6)-degrees, S-P-O 100.96(12)-110.61(12)-degrees, O- P-O = 106.03(17)-120.05(17)-degrees, O-H = 0.78(5)-0.89 angstrom, P-O- H = 112(5)-121-degrees.