metal-organic compounds
Tetraphenylphosphonium pentachlorostannate contains trigonal-bipyramidal [SnCl5]- ions. It is isotypic with PPh4[SnCH3Cl4]; however, the published space group of the latter is corrected from P2 to P2/n. In the hydrate the [SnCl5·H2O]- ions have a distorted octahedral configuration. The packing principle is the same for both compounds and corresponds to the known arrangement in tetraphenylphosphonium compounds with PPh4+ ions stacked in columns in the c direction.