Mass Spectra of Organo-Metallic Compounds: X. Some Mononuclear Olefinic Derivatives of Metal Carbonyls

Abstract

The mass spectra of the following olefin derivatives of metal carbonyls have been investigated: (a) Arene—tungsten tricarbonyl complexes of toluene, p-xylene, and mesitylene; (b) The cycloheptatriene—metal tricarbonyl complexes C₇H₈M(CO)₃ (M = Cr and W); (c) The 1,3,5-cyclooctatriene complex C₈H₁₀W(CO)₃; (d) The cyclooctatetraene—metal tricarbonyl complexes C₈H₈M (CO)₃ (M = Cr or Fe); (e) The 1,5-cyclooctadiene—metal tetracarbonyl complexes C₈H₁₂M(CO)₄ (M = Mo or W); (f) The tungsten tetracarbonyl complexes of bicyclo[2,2,1] heptadiene and dicyclopentadiene; (g) The 1,3-cyclohexadiene complexes (C₆H₈)₂M(CO)₂ (M = Mo or W); (h) The cycloheptadienol complex (C₇H₉OH)Fe(CO)₃; (i) The methyl vinyl ketone complexes (CH₃COCH = CH₂)₃M (M = Mo or W); (j) A product of composition C₁₂H₁₆Fe(CO)₂ obtained from allene dimer and Fe₃(CO)₁₂. The following fragmentation processes of particular interest were observed: (a) The facile dehydrogenation of ions containing the π-bonded 1,3,5-cyclooctatriene, 1,5-cyclooctadiene, and 1,3-cyclohexadiene ligands with two adjacent CH₂ groups; (b) Elimination of neutral C₅H₆ fragments from tungsten carbonyl ions containing π-bonded bicyclo[2,2,1] heptadiene or dicyclopentadiene ligands; (c) Facile dehydration of iron carbonyl ions with π-bonded cycloheptadienol.

Keywords

Mass spectra Organometallic compounds Olefin complexes Metal carbonyls

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