Crystal structure of pentachloro(3,3'-thiodipropionitrile)tantalum(V), TaCl5[NC(CH2)2S(CH2)2CN] and of pentachloro(3,3'-thiodipropionitrile) niobium(V), NbCl5[NC(CH2)2S(CH2)2CN] - Abdelhalim-Ahmed Ibrahim (De Gruyter, 1999)