A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes

Yi-Hwa Song; Yun Chi; Yao-Lun Chen; Chao-Shiuan Liu; Wei-Li Ching; Arthur J. Carty; Shie-Ming Peng; Gene-Hsiang Lee

doi:10.1021/om020445r

A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes

Yi-Hwa Song
, Yun Chi
, Yao-Lun Chen
, Chao-Shiuan Liu
, Wei-Li Ching
, Arthur J. Carty
, Shie-Ming Peng
, Gene-Hsiang Lee

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

12 Citations (Scopus)

Abstract

The reaction of Ru₃(CO)₁₂ with approximately 3 equiv of 3,5-di-tert-butylpyrazole, (dbpz)H, in hexane at 170 °C in a stainless steel autoclave afforded the unsaturated, pyrazolate-bridged diruthenium complex [Ru₂(CO)₅(dbpz)₃] (2). The spectroscopic and structural analysis indicated that this compound contains a vacant coordination site at one axial position trans to the Ru-Ru linkage. This compound reacted with CO at room temperature to give the saturated complex [Ru₂(CO)₆(dbpz)₂] (1b); its structure is analogous to that of the previously determined complexes [Ru₂(CO₆(pz)₂], pz = pyrazolate and 3,5-dimethyl pyrazolate, except that the equatorial CO ligands show a skew arrangement, an indication of steric constraints within the coordination sphere. Treatment of 2 with benzyl isocyanide or with pyridine in toluene leads to the formation of substitution products [Ru₂(CO)₄(L)(dbpz)₂], L = CNCH₂Ph and pyridine, in which the incoming donor ligand occupies an equatorial position at the saturated Ru center. The structural significance of this pyrazolate-bridged diruthenium complex 2 is discussed.

Original language	English
Pages (from-to)	4735-4742
Journal	Organometallics
Volume	21
Issue number	22
Online published	1 Oct 2002
DOIs	https://doi.org/10.1021/om020445r
Publication status	Published - 28 Oct 2002
Externally published	Yes

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@article{c2cf427a72be4401b9df249155124ebe,

title = "A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes",

abstract = "The reaction of Ru3(CO)12 with approximately 3 equiv of 3,5-di-tert-butylpyrazole, (dbpz)H, in hexane at 170 °C in a stainless steel autoclave afforded the unsaturated, pyrazolate-bridged diruthenium complex [Ru2(CO)5(dbpz)3] (2). The spectroscopic and structural analysis indicated that this compound contains a vacant coordination site at one axial position trans to the Ru-Ru linkage. This compound reacted with CO at room temperature to give the saturated complex [Ru2(CO)6(dbpz)2] (1b); its structure is analogous to that of the previously determined complexes [Ru2(CO6(pz)2], pz = pyrazolate and 3,5-dimethyl pyrazolate, except that the equatorial CO ligands show a skew arrangement, an indication of steric constraints within the coordination sphere. Treatment of 2 with benzyl isocyanide or with pyridine in toluene leads to the formation of substitution products [Ru2(CO)4(L)(dbpz)2], L = CNCH2Ph and pyridine, in which the incoming donor ligand occupies an equatorial position at the saturated Ru center. The structural significance of this pyrazolate-bridged diruthenium complex 2 is discussed.",

author = "Yi-Hwa Song and Yun Chi and Yao-Lun Chen and Chao-Shiuan Liu and Wei-Li Ching and Carty, \{Arthur J.\} and Shie-Ming Peng and Gene-Hsiang Lee",

year = "2002",

month = oct,

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doi = "10.1021/om020445r",

language = "English",

volume = "21",

pages = "4735--4742",

journal = "Organometallics",

issn = "0276-7333",

publisher = "American Chemical Society",

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TY - JOUR

T1 - A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes

AU - Song, Yi-Hwa

AU - Chi, Yun

AU - Chen, Yao-Lun

AU - Liu, Chao-Shiuan

AU - Ching, Wei-Li

AU - Carty, Arthur J.

AU - Peng, Shie-Ming

AU - Lee, Gene-Hsiang

PY - 2002/10/28

Y1 - 2002/10/28

N2 - The reaction of Ru3(CO)12 with approximately 3 equiv of 3,5-di-tert-butylpyrazole, (dbpz)H, in hexane at 170 °C in a stainless steel autoclave afforded the unsaturated, pyrazolate-bridged diruthenium complex [Ru2(CO)5(dbpz)3] (2). The spectroscopic and structural analysis indicated that this compound contains a vacant coordination site at one axial position trans to the Ru-Ru linkage. This compound reacted with CO at room temperature to give the saturated complex [Ru2(CO)6(dbpz)2] (1b); its structure is analogous to that of the previously determined complexes [Ru2(CO6(pz)2], pz = pyrazolate and 3,5-dimethyl pyrazolate, except that the equatorial CO ligands show a skew arrangement, an indication of steric constraints within the coordination sphere. Treatment of 2 with benzyl isocyanide or with pyridine in toluene leads to the formation of substitution products [Ru2(CO)4(L)(dbpz)2], L = CNCH2Ph and pyridine, in which the incoming donor ligand occupies an equatorial position at the saturated Ru center. The structural significance of this pyrazolate-bridged diruthenium complex 2 is discussed.

AB - The reaction of Ru3(CO)12 with approximately 3 equiv of 3,5-di-tert-butylpyrazole, (dbpz)H, in hexane at 170 °C in a stainless steel autoclave afforded the unsaturated, pyrazolate-bridged diruthenium complex [Ru2(CO)5(dbpz)3] (2). The spectroscopic and structural analysis indicated that this compound contains a vacant coordination site at one axial position trans to the Ru-Ru linkage. This compound reacted with CO at room temperature to give the saturated complex [Ru2(CO)6(dbpz)2] (1b); its structure is analogous to that of the previously determined complexes [Ru2(CO6(pz)2], pz = pyrazolate and 3,5-dimethyl pyrazolate, except that the equatorial CO ligands show a skew arrangement, an indication of steric constraints within the coordination sphere. Treatment of 2 with benzyl isocyanide or with pyridine in toluene leads to the formation of substitution products [Ru2(CO)4(L)(dbpz)2], L = CNCH2Ph and pyridine, in which the incoming donor ligand occupies an equatorial position at the saturated Ru center. The structural significance of this pyrazolate-bridged diruthenium complex 2 is discussed.

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0038157386&origin=recordpage

U2 - 10.1021/om020445r

DO - 10.1021/om020445r

M3 - RGC 21 - Publication in refereed journal

SN - 0276-7333

VL - 21

SP - 4735

EP - 4742

JO - Organometallics

JF - Organometallics

IS - 22

ER -

A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes

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