Structures of propionaldehyde, butyraldehyde, and pivalaldehyde complexes of the chiral rhenium fragment [(η5-C5H5)Re(NO)(PPh3)]+ Academic Article uri icon

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) Å, b = 18.316(1) Å, c = 14.872(2) Å, 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) Å, b = 18.623(3) Å, c = 10.026(2) Å, β = 102.95(1)°, Z = 4) have been determined at 22°C and -125°C, respectively. These exhibit C{A figure is presented}O bond lengths (1.35(1), 1.338(5) Å) that are intermediate between those of propionaldehyde (1.209(4) Å) and 1-propanol (1.41 Å). 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 C{A figure is presented}O binding mode. © 1993.

author list (cited authors)

  • Klein, D. P., Méndez, N. Q., Seyler, J. W., Arif, A. M., & Gladysz, J. A.

citation count

  • 6

publication date

  • May 1993