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2 Polish Journal of Chemistry

2 1998

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The synthesis, crystal, molecular and electronic structure of [ReCl3(NO)(OPPh3)(PPh3)] complex

Dzięgielewski J.O., Machura B., Kupka T., Bartczak T.J., Czurak W.

Polish Journal of Chemistry

1998

Vol. 72, nr 6

1009-1016

A new rhenium(II) nitrosyl complex has been synthesized and characterized by IR, UV-VIS, NMR ((1)H and (31)P) and magnetochemical measurements. Its ligand field parameters have been determined (Dq=2810, Ds=-3712 and Dt=822 cm(-1)). The crystal and molecular structure of [ReCl3(NO)(OPPh3)(PPh3)] has been solved by the heavy atom method and refined anisotropically to R=5.52% for 7525 unique observed reflections. The crystals of [ReCl3(NO)(OPPh3)(PPh3)] contain distorted octahedral molecules, in which the triphenylphosphine ligand is trans with respect to one chlorine atom and O-triphenylphosphine ligand is trans to nitrosyl group. The PPh3 and OPPh3 groups are cis. Re-Cl bond trans to PPh3 [2.377(2) A] is longer than the mutually trans Re-Cl bonds [2.358(2) and 2.350(2) A]. The rhenium atom is pushed by 0.12 A towards nitrosyl ligand out of the least-squares plane defined by the atoms: Cl(1), Cl(2), Cl(3) and P(2).

Crystal, molecular and electronic structure of [ReBr3(NO)(MeCN)(PPh3)]complex

Bartczak T.J., Czurak W., Dzięgielewski J.O., Machura B.

Polish Journal of Chemistry

1998

Vol. 72, nr 3

633-642

A new rhenium nitrosyl complex has been symthesized and characterized by IR, UV-Vis, NMR ((1)H and (31)P) and magnetochemical measurements. The crystal and molecular structure of [ReBr3(NO)(MeCN)(PPh3)] has been determined by X-rays . The Re atom is of six-coordinate distorted octahedral configuration and linear nitrosyl ligand is trans towards the acetonitrile molecule.