title: Crystal structures of trans-acetyl-dicarbon-yl(η(5)-cyclo-penta-dien-yl)(di-methyl-phenyl-phosphane)molybdenum(II) and trans-acetyl-dicarbon-yl(η(5)-cyclo-penta-dien-yl)(ethyl-diphenyl-phosphane)molybdenum(II).
abstract: The title compounds, [Mo(C5H5)(COCH3)P(CH3)2(C6H5)(CO)2], (1), and [Mo(C5H5)(COCH3)P(C2H5)(C6H5)2)(CO)2], (2), have been prepared by phosphine-induced migratory insertion from [Mo(C5H5)(CO)3(CH3)]. Both complex mol-ecules exhibit a four-legged piano-stool geometry with trans-disposed carbonyl ligands along with Mo-P bond lengths and C-Mo-P angles that reflect the relative steric pressure of the respective phosphine ligand. The structure of compound (1) exhibits a layered arrangement parallel to (100). Within the layers mol-ecules are linked into chains along [001] by non-classical C-H⋯O inter-actions between the acetyl ligand of one mol-ecule and the phenyl and methyl phosphine substituents of another. In the structure of complex (2), a chain motif of centrosymmetrical dimers is found along [010] through C-H⋯O inter-actions.
authors.affiliation: Department of Chemistry, Carleton College, 1 N College St, Northfield, MN 55057, USA.
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Whited
authors.affiliation: Department of Chemistry, Carleton College, 1 N College St, Northfield, MN 55057, USA.
authors.forename: Gretchen E
authors.initials: GE
authors.lastname: Hofmeister
authors.affiliation: Department of Chemistry, Carleton College, 1 N College St, Northfield, MN 55057, USA.
authors.forename: Connor J
authors.initials: CJ
authors.lastname: Hodges
authors.affiliation: Department of Chemistry, Carleton College, 1 N College St, Northfield, MN 55057, USA.
authors.forename: Laramie T
authors.initials: LT
authors.lastname: Jensen
authors.affiliation: Department of Chemistry, Carleton College, 1 N College St, Northfield, MN 55057, USA.
authors.forename: Samuel H
authors.initials: SH
authors.lastname: Keyes
authors.affiliation: Department of Chemistry, Carleton College, 1 N College St, Northfield, MN 55057, USA.
authors.forename: Aurapat
authors.initials: A
authors.lastname: Ngamnithiporn
authors.affiliation: Department of Chemistry and Biochemistry, St. Catherine University, 2004 Randolph Ave., St. Paul, MN 55105, USA.
authors.forename: Daron E
authors.initials: DE
authors.lastname: Janzen
keywords: acet­yl; crystal structure; divalent molybdenum; phosphine; piano-stool complex