SYNTHESIS, CHARACTERIZATION AND ELECTRONIC-STRUCTURE OF THE NOVEL STELLATED OCTAHEDRAL CLUSTER [CO-6(MU(3)-S)(7)(MU(3)-H)-(PET(3))(6)](- CRYSTAL AND MOLECULAR-STRUCTURE OF ](0.7)[CO-6(MU(3)-S)(8)(PET(3))(6)](0.3)[BPH(4)]() )
F. Cecconi et al., SYNTHESIS, CHARACTERIZATION AND ELECTRONIC-STRUCTURE OF THE NOVEL STELLATED OCTAHEDRAL CLUSTER [CO-6(MU(3)-S)(7)(MU(3)-H)-(PET(3))(6)](- CRYSTAL AND MOLECULAR-STRUCTURE OF ](0.7)[CO-6(MU(3)-S)(8)(PET(3))(6)](0.3)[BPH(4)]() ), Journal of the Chemical Society. Dalton transactions, (23), 1995, pp. 3881-3889
Reaction of Co(O(2)CMe)(2) . 4H(2)O with an excess of PEt(3) and H2S a
fforded the novel diamagnetic octahedral cluster [Co-6(mu(3)-S)(7)(mu(
3)-H)(PEt(3))(6)](+) together with a minor amount of the known paramag
netic isostructural [Co-6(mu(3)-S)(8)(PEt(3))(6)](+). Solid solutions
of the two cluster cations have been isolated as the BPh(4)(-) salt. T
he deuteriated derivative [Co-6(mu(3)-S)(7)(mu(3)-D)(PEt(3))(6)](+) ha
s been prepared for comparison. The compounds have been characterized
by H-1, P-31 NMR, mass spectrometry and electrochemical measurements.
The molecular structure of a sample of composition 6)](0.7)[Co-6(mu(3)
-S)(8)(PEt(3))(6)](0.3)[BPh(4)] has been determined by single-crystal
X-ray diffraction. It consists of a solid solution of [Co-6(mu(3)-S)(7
)(mu(3)-H)(PEt(3))(6)](+) and [Co-6(mu(3)-S)(8)(PEt(3))(6)](+). The ca
tion (3))(6)](0.7)[Co-6(mu(3)-S)(8)(PEt(3))(6)](+)(0.3) is isostructur
al with the series [M(6)(mu(3)-S)(8)(PEt(3))(6)](n+), having a metal-m
etal separation averaging 2.739(8) A. The electronic structure of the
novel hydridoderivative has been investigated through density function
al calculations.