Effects on Coordination of Thioether Sites. 4. Structural Analysis of η3-Tripodal Ligand Manganese(I) Complexes
Journal
Journal of the Chinese Chemical Society
Journal Volume
44
Journal Issue
4
Pages
427-430
Date Issued
1997
Author(s)
Abstract
Crystal structures of a series of manganese(I) complexes containing tripodal ligands were determined. For [η3-{CH3C(CH2PPh2) 2(CH2SPh)-P,P′,S}Mn(CO)3]PF6 (1): a = 10.856(3) Å, b = 19.698(3) Å, c = 17.596(5) Å, β = 96.17(2)°, monoclinic, Z = 4, P21/c, R(Fo) = 0.068, Rw(Fo) = 0.055 for 3617 reflections with Io > 2σ(Io). For [η3-{CH3C(CH2PPh2)(CH 2SPh)2-P,S,S′}Mn(CO)3]PF6 (2): a = 9.890(2) Å, b = 20.403(4) Å, c = 10.269(3) Å, β = 117.44(2)°, monoclinic, Z = 2, P21, R(Fo) = 0.050, Rw(Fo) = 0.037 for 1760 reflections with Io > 2σ(Io). For [η3{CH3C(CH2PPb2) 2(CH2S)-P,P′,S}Mn(CO)3] (4): a = 8.191(7) Å, b = 10.495(3) Å, c = 19.858(6) Å, a = 99.61(2) , β = 96.17(2)°, γ = 92.70(4)°, triclinic, Z = 2, P-1, R(Fo) = 0.048, Rw(Fo) = 0.039 for 2973 reflections with Io > 2σ(Io). There is no significant difference in the bond lengths of Mn-S bonds among three species in their crystal structures [2.325(2) Å in 1; 2.358(4) in 2; 2.380(2) in 4], but the better donating ability of thiolate in complex 4 appears on the lower frequencies of its carbonyl stretching absorptions.
Type
journal article