Activated molybdenum-molybdenum quadruple bonds. Synthesis, structure, and properties of (Mo sub 2 (O sub 2 CMe) sub 2 (en) sub 4 )((O sub 2 CMe) sub 2 )ter dot en: A solid-state model for a solvent-shared ion pair

Journal Article · Tue Feb 20 23:00:00 EST 1990 · Inorganic Chemistry; (USA)

DOI:https://doi.org/10.1021/ic00329a030· OSTI ID:7121546

Eichhorn, B W; Kerby, M C; Haushalter, R C ^[1]; Vollhardt, K P.C. ^[2]

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1. Exxon Research and Engineering Co., Annandale, NJ (USA)
2. Univ. of California, Berkeley (USA)

Mo{sub 2}(O{sub 2}CMe){sub 4} (Mo-{sup 4}Mo) reacts with neat ethylenediamine (en) to form (Mo{sub 2}(O{sub 2}CMe){sub 2}(en){sub 4})((O{sub 2}CMe){sub 2}) {times} en (1) in high yield. The Mo{sub 2}(O{sub 2}CMe){sub 2}(en){sub 4}{sup 2+} ion in 1 contains a quadruply bonded Mo{sub 2}{sup 4+} center (Mo-Mo = 2.125 (1) {angstrom}) supported by two axial and two spanning en ligands in addition to two spanning acetates. The complex exists as an ion pair in which the displaced acetates are separated from the Mo{sub 2} coordination sphere by the two spanning en ligands. The acetate counterions are hydrogen bonded to the spanning en ligands (N-O = 2.86 (2) {angstrom} (av)). Compound 1 converts back to Mo{sub 2}(O{sub 2}CMe){sub 4} at 120{degree}C in the solid state. NMR studies show that dissociated and coordinated acetate ligands are present in neat en whereas, in D{sub 2}O, only dissociated en and acetate are observed. Crystal data for 1 (20{degree}C) is reported. 35 refs., 3 figs., 4 tabs.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7121546
• Journal Information: Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 29:4; ISSN 0020-1669; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKENES
AMINES
CARBOXYLIC ACID ESTERS
COMPLEXES
DATA
ESTERS
ETHYLENE
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
MOLECULAR STRUCTURE
MOLYBDENUM COMPLEXES
NUMERICAL DATA
ORGANIC COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPLEXES