The synthesis and characterization of α-W2Cl4(dppp)2

Article abstract of DOI:10.1016/0020-1693(95)04800-6

To date, few quadruply bonded ditungsten compounds have been synthesized. Only four bidentate phosphine ligands (L-L) have been utilized in the synthesis of compounds of the general type W₂Cl₄(L-L)₂. These phosphine ligands include: bis(diphenylphosphino)methane (dppm) [1], 1,2-bis(diphenylphosphino)ethane (dppe) [2], 1,2-bis(dimethylphosphino)ethane (dmpe) [3] and 1,3-bis(diisopropylphosphino)propane (dippp) [4]. Of particular interest is the ability of these bidentate ligands to chelate to one metal center (α form) or bridge both metal centers (β form). Results from the synthesis and characterization of α-W₂Cl₄(dppp)2 (dppp=1,3-bis(diphenylphosphino)propane) are discussed. Crystallographic data for this compound are as follows: P1 (No. 2) with a = 11.934(9), b = 12.315(7), c = 12.513(4) A, α = 83.82(4), β = 75.03(5), γ = 62.01(5)°, V = 1569(2) A³ and Z = 1.