HETEROCARBOXYLATES OF MOLYBDENUM AND TUNGSTEN NITROSYL HALIDES

Reactions of molybdenum nitrosyl chloride [{MoCl2(NO)2}n] and tungsten nitrosyl bromide [{WBr2(NO)2}n] with picolinic acid (PAH), nicotinic acid (NAH), isonicotinic acid (INAH), dipicolinic acid (DPAH), and of molybdenum nitrosyl chloride with indole-3-acetic acid (IAH), indole-3-propionic acid (IPH), indole-3-butyric acid (IBH) and L-tryptophan (TRH) in tetrahydrofuran have been studied. Complexes of the type [{MX2(NO)2.2(HL)}n] (where M=Mo/W, X=Cl/Br, HA-heterocarboxylic acid) have been isolated and characterized on the basis of elemental analyses and spectral studies. The magnetic susceptibilty data suggest that these complexes are diamagnetic.