D. P. Klein, N. Mendez, Jeffery W. Seyler
May 18, 1993
Citations
0
Influential Citations
5
Citations
Journal
Journal of Organometallic Chemistry
Abstract
The crystal structures of propionaldehyde complex (RS,SR)-(η5-C5H5)Re(NO)(PPh3)(η2-OCHCH2CH3)]+ PF6− (1b+ PF6s−; monoclinic, P21/c (No. 14), a = 10.166 (1) A, b = 18.316(1) A, c = 14.872(2) A, β = 100.51(1)°, Z = 4) and butyraldehyde complex (RS,SR)-[(η5-C5H5)Re(NO)(PPh3)(η2-OCHCH2CH2CH3)]+ PF6− (1c+PF6−; monoclinic, P21/a (No. 14), a = 14.851(1) A, b = 18.623(3) A, c = 10.026(2) A, β = 102.95(1)°, Z = 4) have been determined at 22°C and −125°C, respectively. These exhibit CO bond lengths (1.35(1), 1.338(5) A) that are intermediate between those of propionaldehyde (1.209(4) A) and 1-propanol (1.41 A). Other geometric features are analyzed. Reaction of [(η5-C5H5)Re(NO)(PPh3)(ClCH2Cl)]+ BF4− and pivalaldehyde gives [(η5-C5H5)Re(NO)(PPh3)(η2-OCHC(CH3)3)]+BF4− (81%), the spectroscopic properties of which establish a π CO binding mode.