Raman and Infrared Spectral Studies of Tungsten Organometallic Carbyne Complex at High External Pressure

Zhen Hua Xu; A. Mayr; Ian S. Butler

Raman and Infrared Spectral Studies of Tungsten Organometallic Carbyne Complex at High External Pressure

Zhen Hua Xu
, A. Mayr
, Ian S. Butler

Chemistry

Peking University
McGill University

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

1 Scopus citations

Abstract

The Raman and infrared spectra of complex:[Cl(CO)₂ (DPPE)W≡CC₆ H₄ C≡CC₆ H₄ NC]₂ Re Cl(CO)₃ (DPPE = bis(diphenylphosphino) ethane, (Ph)₂ PCH₂ CH₂ P(Ph)₂) were measured at high external pressure (up to about 50 kbar). The pressure induced phase transition was observed near 30 kbar. The pressure dependence dv/dp of v(W≡C) at the low-pressure phase is a little high (0.59 cm^-1 · (kbar)^-1) and is very low (0.04 cm^-1 · (kbar)^-1) at the high-pressure phase. It shows that the π-backbonding from W to π* -orbital of CO is strengthened at the high external pressure in fragment Cl(CO)₂ (DPPE) W≡C; The bond intensity and the force constant of W≡C and v(W≡C) are decreasing; This effect compete with the normal increasing v(W≡C) on compression.

Original language	English
Pages (from-to)	598
Number of pages	1
Journal	Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
Volume	21
Issue number	5
State	Published - Oct 2001

Keywords

Carbyne
High pressure
Infrared
Phase transition
Raman

Cite this

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title = "Raman and Infrared Spectral Studies of Tungsten Organometallic Carbyne Complex at High External Pressure",

abstract = "The Raman and infrared spectra of complex:[Cl(CO)2 (DPPE)W≡CC6 H4 C≡CC6 H4 NC]2 Re Cl(CO)3 (DPPE = bis(diphenylphosphino) ethane, (Ph)2 PCH2 CH2 P(Ph)2) were measured at high external pressure (up to about 50 kbar). The pressure induced phase transition was observed near 30 kbar. The pressure dependence dv/dp of v(W≡C) at the low-pressure phase is a little high (0.59 cm-1 · (kbar)-1) and is very low (0.04 cm-1 · (kbar)-1) at the high-pressure phase. It shows that the π-backbonding from W to π* -orbital of CO is strengthened at the high external pressure in fragment Cl(CO)2 (DPPE) W≡C; The bond intensity and the force constant of W≡C and v(W≡C) are decreasing; This effect compete with the normal increasing v(W≡C) on compression.",

keywords = "Carbyne, High pressure, Infrared, Phase transition, Raman",

author = "Xu, \{Zhen Hua\} and A. Mayr and Butler, \{Ian S.\}",

year = "2001",

month = oct,

language = "English",

volume = "21",

pages = "598",

journal = "Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis",

issn = "1000-0593",

number = "5",

}

TY - JOUR

T1 - Raman and Infrared Spectral Studies of Tungsten Organometallic Carbyne Complex at High External Pressure

AU - Xu, Zhen Hua

AU - Mayr, A.

AU - Butler, Ian S.

PY - 2001/10

Y1 - 2001/10

N2 - The Raman and infrared spectra of complex:[Cl(CO)2 (DPPE)W≡CC6 H4 C≡CC6 H4 NC]2 Re Cl(CO)3 (DPPE = bis(diphenylphosphino) ethane, (Ph)2 PCH2 CH2 P(Ph)2) were measured at high external pressure (up to about 50 kbar). The pressure induced phase transition was observed near 30 kbar. The pressure dependence dv/dp of v(W≡C) at the low-pressure phase is a little high (0.59 cm-1 · (kbar)-1) and is very low (0.04 cm-1 · (kbar)-1) at the high-pressure phase. It shows that the π-backbonding from W to π* -orbital of CO is strengthened at the high external pressure in fragment Cl(CO)2 (DPPE) W≡C; The bond intensity and the force constant of W≡C and v(W≡C) are decreasing; This effect compete with the normal increasing v(W≡C) on compression.

AB - The Raman and infrared spectra of complex:[Cl(CO)2 (DPPE)W≡CC6 H4 C≡CC6 H4 NC]2 Re Cl(CO)3 (DPPE = bis(diphenylphosphino) ethane, (Ph)2 PCH2 CH2 P(Ph)2) were measured at high external pressure (up to about 50 kbar). The pressure induced phase transition was observed near 30 kbar. The pressure dependence dv/dp of v(W≡C) at the low-pressure phase is a little high (0.59 cm-1 · (kbar)-1) and is very low (0.04 cm-1 · (kbar)-1) at the high-pressure phase. It shows that the π-backbonding from W to π* -orbital of CO is strengthened at the high external pressure in fragment Cl(CO)2 (DPPE) W≡C; The bond intensity and the force constant of W≡C and v(W≡C) are decreasing; This effect compete with the normal increasing v(W≡C) on compression.

KW - Carbyne

KW - High pressure

KW - Infrared

KW - Phase transition

KW - Raman

UR - https://www.scopus.com/pages/publications/0348238105

M3 - Article

C2 - 12945305

AN - SCOPUS:0348238105

SN - 1000-0593

VL - 21

SP - 598

JO - Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

JF - Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

IS - 5

ER -

Raman and Infrared Spectral Studies of Tungsten Organometallic Carbyne Complex at High External Pressure

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