Arene-metal complexes: Preparation and reactions of h6-arene-Cr(CO)2(diphos) and analogs

M. F. Semmelhack; Walter Seufert; L. Keller

doi:10.1016/S0022-328X(00)87434-3

Arene-metal complexes: Preparation and reactions of h⁶-arene-Cr(CO)₂(diphos) and analogs

M. F. Semmelhack, Walter Seufert, L. Keller

Chemistry

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

22 Scopus citations

Abstract

Reaction of 1,2-bis(triphenylphosphino)ethane (diphos) with h⁶-arenetricarbonylchromium(0) complexes results in replacement of one CO by diphos to give h⁶-arene(diphos)dicarbonylchromium(0) (e.g., complex 4) and μ-diphosbis(h⁶-arene)tetracarbonyldichromium(0). Comparison of rate of arene exchange for h⁶-benzenetricarbonylchromium, h⁶-benzene(triphenylphosphine)dicarbonylchromium, and complex 4 showed that: (1) replacement of CO by a phosphine retards arene exchange and (2) the effect of diphos in stabilizing an h⁴-benzene ligand in complex 4 is not sufficient to allow rapid arene exchange. Nucleophilic substitution for hydrogen was observed for the first time in a phosphine-substituted arene-chromium complex.

Original language	English (US)
Pages (from-to)	183-190
Number of pages	8
Journal	Journal of Organometallic Chemistry
Volume	226
Issue number	2
DOIs	https://doi.org/10.1016/S0022-328X(00)87434-3
State	Published - Feb 22 1982

All Science Journal Classification (ASJC) codes

Biochemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/S0022-328X(00)87434-3

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title = "Arene-metal complexes: Preparation and reactions of h6-arene-Cr(CO)2(diphos) and analogs",

abstract = "Reaction of 1,2-bis(triphenylphosphino)ethane (diphos) with h6-arenetricarbonylchromium(0) complexes results in replacement of one CO by diphos to give h6-arene(diphos)dicarbonylchromium(0) (e.g., complex 4) and μ-diphosbis(h6-arene)tetracarbonyldichromium(0). Comparison of rate of arene exchange for h6-benzenetricarbonylchromium, h6-benzene(triphenylphosphine)dicarbonylchromium, and complex 4 showed that: (1) replacement of CO by a phosphine retards arene exchange and (2) the effect of diphos in stabilizing an h4-benzene ligand in complex 4 is not sufficient to allow rapid arene exchange. Nucleophilic substitution for hydrogen was observed for the first time in a phosphine-substituted arene-chromium complex.",

author = "Semmelhack, {M. F.} and Walter Seufert and L. Keller",

note = "Funding Information: We wish to thank the National Science Foundation for generous support of this work and DAAD (Bonn, West Germany) for a fellowship to WS. We thank the Schwartzkopf Microanalytical Laboratory for the osmometric molecular weight determination and Ms. Mary Baum (Princeton) for her expert assistance with the NMR spectra. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "1982",

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doi = "10.1016/S0022-328X(00)87434-3",

language = "English (US)",

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T2 - Preparation and reactions of h6-arene-Cr(CO)2(diphos) and analogs

AU - Semmelhack, M. F.

AU - Seufert, Walter

AU - Keller, L.

N1 - Funding Information: We wish to thank the National Science Foundation for generous support of this work and DAAD (Bonn, West Germany) for a fellowship to WS. We thank the Schwartzkopf Microanalytical Laboratory for the osmometric molecular weight determination and Ms. Mary Baum (Princeton) for her expert assistance with the NMR spectra. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1982/2/22

Y1 - 1982/2/22

N2 - Reaction of 1,2-bis(triphenylphosphino)ethane (diphos) with h6-arenetricarbonylchromium(0) complexes results in replacement of one CO by diphos to give h6-arene(diphos)dicarbonylchromium(0) (e.g., complex 4) and μ-diphosbis(h6-arene)tetracarbonyldichromium(0). Comparison of rate of arene exchange for h6-benzenetricarbonylchromium, h6-benzene(triphenylphosphine)dicarbonylchromium, and complex 4 showed that: (1) replacement of CO by a phosphine retards arene exchange and (2) the effect of diphos in stabilizing an h4-benzene ligand in complex 4 is not sufficient to allow rapid arene exchange. Nucleophilic substitution for hydrogen was observed for the first time in a phosphine-substituted arene-chromium complex.

AB - Reaction of 1,2-bis(triphenylphosphino)ethane (diphos) with h6-arenetricarbonylchromium(0) complexes results in replacement of one CO by diphos to give h6-arene(diphos)dicarbonylchromium(0) (e.g., complex 4) and μ-diphosbis(h6-arene)tetracarbonyldichromium(0). Comparison of rate of arene exchange for h6-benzenetricarbonylchromium, h6-benzene(triphenylphosphine)dicarbonylchromium, and complex 4 showed that: (1) replacement of CO by a phosphine retards arene exchange and (2) the effect of diphos in stabilizing an h4-benzene ligand in complex 4 is not sufficient to allow rapid arene exchange. Nucleophilic substitution for hydrogen was observed for the first time in a phosphine-substituted arene-chromium complex.

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Arene-metal complexes: Preparation and reactions of h⁶-arene-Cr(CO)₂(diphos) and analogs

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