Bis(tetraphenylphosphonium) Tetrachlorodioxouranate(VI) Dichloromethane Solvate

Crystals of the title compound, (C₂₄H₂₀P)₂[UO₂Cl₄].CH₂Cl₂, contain pseudo-octahedral tetrachlorouranyl anions having approximate D_4h and exact C_i point symmetry. The asymmetric unit contains two such anions, each distinct and isolated, and each unperturbed by close anion-anion packing, hydrogen bonding or the presence of small polarizing cations. The U=O bond lengths are 1.75 (1) and 1.77 (1) Å, and provide points of reference for the recently reported oxouranium (phosphorane iminato) complex containing the O=U=N- group.

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