Molecular Structure and Chemical Properties of [Et4N][(Ph3Sn)3Cr(CO)4], a Chromium Carbonyl Complex Containing Seven Unidentate Ligands

Jiann T. Lin; Gary P. Hagen; John E. Ellis

doi:10.1021/om00086a025

Molecular Structure and Chemical Properties of [Et₄N][(Ph₃Sn)₃Cr(CO)₄], a Chromium Carbonyl Complex Containing Seven Unidentate Ligands

Jiann T. Lin, Gary P. Hagen, John E. Ellis

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The X-ray structure of [Et₄N][(Ph₃Sn)₃Cr(CO)₄] shows the presence of seven-coordinate chromium bound to four terminal carbonyl groups and three triphenyltin units. The anion is of approximate C_3v symmetry; a triangular face of tin atoms is capped by a carbon monoxide unit. This is the first structurally characterized chromium carbonyl complex containing seven unidentate ligands and the initial example of a molecule of the general formula X₃Cr(CO)₄ ^-. The crystalline material is triclinic (space group P1) with cell parameters a = 14.371 (4) Å, b = 20.560 (10) Å, c = 10.730 (5) Å, α = 99.21 (4)°, β = 105.07 (3)°, Γ = 83.29 (3)°, V = 3012 (4) Å³, and Z = 2. Reactions of (Ph₃Sn)₃Cr(CO)₄ ^- with Ph₃SnLi, MeLi, Ph₃P, and hexamethylphophoramide result in the loss of one triphenyltin group and the formation of moderate to high yields of the six-coordinate anion (Ph₃Sn)₂Cr(CO)₄ ^2-.

Original language	English (US)
Pages (from-to)	1288-1292
Number of pages	5
Journal	Organometallics
Volume	3
Issue number	8
DOIs	https://doi.org/10.1021/om00086a025
State	Published - Nov 1984

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title = "Molecular Structure and Chemical Properties of [Et4N][(Ph3Sn)3Cr(CO)4], a Chromium Carbonyl Complex Containing Seven Unidentate Ligands",

abstract = "The X-ray structure of [Et4N][(Ph3Sn)3Cr(CO)4] shows the presence of seven-coordinate chromium bound to four terminal carbonyl groups and three triphenyltin units. The anion is of approximate C3v symmetry; a triangular face of tin atoms is capped by a carbon monoxide unit. This is the first structurally characterized chromium carbonyl complex containing seven unidentate ligands and the initial example of a molecule of the general formula X3Cr(CO)4 -. The crystalline material is triclinic (space group P1) with cell parameters a = 14.371 (4) {\AA}, b = 20.560 (10) {\AA}, c = 10.730 (5) {\AA}, α = 99.21 (4)°, β = 105.07 (3)°, Γ = 83.29 (3)°, V = 3012 (4) {\AA}3, and Z = 2. Reactions of (Ph3Sn)3Cr(CO)4 - with Ph3SnLi, MeLi, Ph3P, and hexamethylphophoramide result in the loss of one triphenyltin group and the formation of moderate to high yields of the six-coordinate anion (Ph3Sn)2Cr(CO)4 2-.",

author = "Lin, {Jiann T.} and Hagen, {Gary P.} and Ellis, {John E.}",

year = "1984",

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AU - Lin, Jiann T.

AU - Hagen, Gary P.

AU - Ellis, John E.

PY - 1984/11

Y1 - 1984/11

N2 - The X-ray structure of [Et4N][(Ph3Sn)3Cr(CO)4] shows the presence of seven-coordinate chromium bound to four terminal carbonyl groups and three triphenyltin units. The anion is of approximate C3v symmetry; a triangular face of tin atoms is capped by a carbon monoxide unit. This is the first structurally characterized chromium carbonyl complex containing seven unidentate ligands and the initial example of a molecule of the general formula X3Cr(CO)4 -. The crystalline material is triclinic (space group P1) with cell parameters a = 14.371 (4) Å, b = 20.560 (10) Å, c = 10.730 (5) Å, α = 99.21 (4)°, β = 105.07 (3)°, Γ = 83.29 (3)°, V = 3012 (4) Å3, and Z = 2. Reactions of (Ph3Sn)3Cr(CO)4 - with Ph3SnLi, MeLi, Ph3P, and hexamethylphophoramide result in the loss of one triphenyltin group and the formation of moderate to high yields of the six-coordinate anion (Ph3Sn)2Cr(CO)4 2-.

AB - The X-ray structure of [Et4N][(Ph3Sn)3Cr(CO)4] shows the presence of seven-coordinate chromium bound to four terminal carbonyl groups and three triphenyltin units. The anion is of approximate C3v symmetry; a triangular face of tin atoms is capped by a carbon monoxide unit. This is the first structurally characterized chromium carbonyl complex containing seven unidentate ligands and the initial example of a molecule of the general formula X3Cr(CO)4 -. The crystalline material is triclinic (space group P1) with cell parameters a = 14.371 (4) Å, b = 20.560 (10) Å, c = 10.730 (5) Å, α = 99.21 (4)°, β = 105.07 (3)°, Γ = 83.29 (3)°, V = 3012 (4) Å3, and Z = 2. Reactions of (Ph3Sn)3Cr(CO)4 - with Ph3SnLi, MeLi, Ph3P, and hexamethylphophoramide result in the loss of one triphenyltin group and the formation of moderate to high yields of the six-coordinate anion (Ph3Sn)2Cr(CO)4 2-.

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Molecular Structure and Chemical Properties of [Et₄N][(Ph₃Sn)₃Cr(CO)₄], a Chromium Carbonyl Complex Containing Seven Unidentate Ligands

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