84433-29-4Relevant academic research and scientific papers
An unusual ditantalum (Ta=Ta) compound with a bridging oxo ligand
Albert Cotton,Roth, Wieslaw J.
, p. 868 - 870 (2008/10/08)
As a minor product in the preparation of Ta2Cl6(dmpe)2 a compound of composition Ta2Cl4(dmpe)2(μ-O)(μ-Me 2S)· HCl·C6H5CH3 has been isolated and structurally characterized. It consists of two distorted TaCl2P2OS octahedra sharing an edge defined by the μ-Me2S and μ-O ligands. The μ-O ligand is strongly hydrogen bonded to a Cl atom, O?Cl = 2.893 (7) A?, which may alternatively be formulated as O?H-Cl or O-H?Cl. The Ta-Ta distance of 2.726 (1) A?, together with the fact that the tantalum atoms are formally TaIII (d2), implies the presence of a double bond between the metal atoms. This compound presumably arises because of hydrolysis by traces of water coupled with the availability of the (CH3)2S ligand, which was present in the starting material, Ta2Cl6(Me2S)3. The compound crystallizes in space group P21/c with a = 14.159 (2) A?, b = 12.487 (3) A?, c = 21.174 (3) A?, β = 108.95 (2)°, V = 3540 (2) A?3, and Z = 4.
