Photoinduced denitrosyl dinuclearizing reaction of dinitrosyl-molybdenum [Mo(didentate-N,S)2(NO)2] complexes

The cis(NO,NO)-trans(S,S)-[MoL2(NO)2] complexes [L = 2-pyrimidinethiolate (pymt) 1 and 2-pyridinethiolate (pyt) 2] were newly prepared by the reaction of the [Mo(NO)2]2+ solution with the thiolate ligands. Under room light, complexes 1 and 2 released one of two nitric oxide (NO) to give μ-OH dinuclear complexes, [{(ON)MoL2}2(μ-OH)2] (L = pymt 3 and pyt 4). The central molybdenum ion circumference turns from six-coordination into seven-coordination, and oxidation number also varies with this reaction from 0 to +II.