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Title Octahedral d[sup 6] Bis(maleimide) and Bis(maleic anhydride) complexes of molybdenum
Creator/Author Lai, Chen-Hsing ; Cheng, Chien-Hong ; Liao, Fen-Ling ; Wang, Sue-Lein (National Tsing Hua Univ., Taiwan (China))
Publication Date1993 Dec 08
OSTI IdentifierOSTI ID: 5037526
Other Number(s)ISSN0020-1669; CODEN: INOCAJ
Resource TypeJournal Article
Resource RelationInorganic Chemistry ; Vol/Issue: 32:25
Subject400201 -- Chemical & Physicochemical Properties; MOLYBDENUM COMPLEXES-- MOLECULAR STRUCTURE; CARBONYLS;CHEMICAL REACTION YIELD;NUCLEAR MAGNETIC RESONANCE;ORGANOMETALLIC COMPOUNDS;TRICLINIC LATTICES
Related SubjectCOMPLEXES;CRYSTAL LATTICES;CRYSTAL STRUCTURE;MAGNETIC RESONANCE;ORGANIC COMPOUNDS;RESONANCE;TRANSITION ELEMENT COMPLEXES;YIELDS
Description/Abstract Mo(CO)[sub 3](CH[sub 3]CN)[sub 3] reacts with 2 equiv of alkene, where the alkene is maleimide (MI), N-phenylmaleimide (PhMI), or N-methylmaleimide, to give the corresponding Mo(CO)[sub 2](alkene)[sub 2](CH[sub 3]CN)[sub 2] complex (1a-c, respectively) in excellent yield.^Dissolution of 1 in DMSO led to the substitution of acetonitrile ligands by DMSO to form the corresponding cis bis(DMSO) complexes 2a-c.^Addition of 1 equiv of NN to 1 yields MO(CO)[sub 2](alkene)[sub 2](alkene)[sub 2](NN) (NN = en, alkene = PhMI (3b), MeMI (3c); NN = o-phenylenediamine, alkene = PhMI (4)).^Treatment of Mo-(CO)[sub 4](NN) (NN = phen or bpy), with 2 equiv of alkene in refluxed acetonitrile for 2 h gave Mo(CO)[sub 2]-(alkene)[sub 2](NN) (NN = phen, alkene = MI (5a), PhMI (5b); NN = bpy, alkene = MI (6a), PhMI (6b)).^Treatment of Mo(CO)[sub 3](CH[sub 3]CN)[sub 3] with 2 equiv of maleic anhydride (MA) gave Mo(CO)[sub 2](MA)[sub 2](CH[sub 3]CN)[sub 2] (7).^The acetonitrile ligands in 7 were replaced by DMSO molecules to give complex 8 as 7 was dissolved in DMSO.^Similarly, the reaction of 7 with a bidentate ligand NN (phen or bpy) gave the substituted product Mo(CO)[sub 2](MA)[sub 2](NN) (9 or 10).^The structures and conformations of 1b and 7 were determined by X-ray diffraction.^Both molecules adopt an octahedral geometry with mutually perpendicular trans alkene ligands and each alkene ligand eclipses a N-Mo-CO vector.^Each PhMI or MA is oriented so that the central nitrogen or oxygen atom points to a carbonyl group.^1b crystallizes in triclinic space group P1.^There are three possible conformations for a trans bis(maleimide) or bis(maleic anhydride) complex (I-III).^The results of X-ray and NMR studies indicated that the main conformation of complexes 1-10 is I both in the solid state and in solution.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 5658-5664
System Entry Date2001 May 13

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