Abstract
The mass spectra of the following olefin derivatives of metal carbonyls have been investigated: (a) Arene-tungsten tricarbonyl complexes of toluene, <i>p</i>-xylene, and mesitylene; (b) The cyclo-heptatriene-metal tricarbonyl complexes C<sub>7</sub>H<sub>8</sub>M(CO)<sub>3</sub> (M = Cr and W); (c) The 1,3,5-cyclo-octatriene complex C<sub>8</sub>H<sub>10</sub>W(CO)<sub>3</sub>; (d) The cyclooctatetraene–metal tricarbonyl complexes C<sub>8</sub>H<sub>8</sub>M(CO)<sub>3</sub> (M=Cr or Fe); (e) The 1,5-cyclooctadiene–metal tetracarbonyl complexes C<sub>8</sub>H<sub>12</sub>M(CO)<sub>4</sub> (M = Mo or W); (f) The tungsten tetracarbonyl complexes of bicyclo[2,2,1] heptadiene and dicyclopentadiene; (g) The 1,3-cyclohexadiene complexes (C<sub>6</sub>H<sub>8</sub>)<sub>2</sub>M(CO)<sub>2</sub> (M = Mo or W); (h) The cycloheptadienol complex (C<sub>7</sub>H<sub>9</sub>OH)Fe(CO)<sub>3</sub>; (i) The methyl vinyl ketone complexes (CH<sub>3</sub>COCH = CH<sub>2</sub>)<sub>3</sub>M (M = Mo or W); (j) A product of composition C<sub>12</sub>H<sub>16</sub>Fe(CO)<sub>2</sub> obtained from allene dimer and Fe<sub>3</sub>(CO)<sub>12</sub>. 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 CH<sub>2</sub> groups; (b) Elimination of neutral C<sub>5</sub>H<sub>6</sub> 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.
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