A new rectangular Re4 cluster compound of the metallocyclodiyne Type

F. Albert Cotton; Evgeny V. Dikarev

doi:10.1007/BF01165470

A new rectangular Re₄ cluster compound of the metallocyclodiyne Type

F. Albert Cotton
, Evgeny V. Dikarev

Chemistry

University at Albany

Texas A&M University

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

14 Scopus citations

Abstract

The compound (n-Bu₄N)₂[Re₄Cl₈(μ-Cl)₂(μ-O)₂ · 2THF] has been prepared from (n-Bu₄N)₂ Re₂Cl₈ by refluxing it in wet trifluoroacetic acid. It forms brown, block-shaped crystals in space group P {Mathematical expression}, with Z = 2 in a cell of dimensions:a = 11.748(1) Å, b = 16.847(3) Å, c = 16.953(3) Å, α = 97.53(1)°β = 106.49(1)° γ = 101.25(1)°V = 3093(1) Å³. There are two independent but practically identical tetranuclear anions, each on a crystallographic inversion center. The short, unbridged Re-Re edges, to which triple bonds are assigned have lengths of 2.280(1) Å and 2.276(1) Å and the longer edges, each with a μ-Cl and a μ-O atom have lengths of 2.611(1) Å and 2.615(1) Å, for molecules 1 and 2 respectively. This anion completes a series going from [Re₄Cl₈(μ-O)₂(μ-OMe)₂]^2- through [Re₄Cl₈(μ-O)₂(μ-OMe)(μ-Cl)]^2- to the present [Re₄Cl₈(μ-O)₂(μ-Cl)₂]^2-. These metallocyclobutadiynes can be viewed as products of the 2,2-cycloaddition of two Re-Re quadruple bonds, but the mechanistic details of how they arise remain obscure.

Original language	English
Pages (from-to)	411-419
Number of pages	9
Journal	Journal of Cluster Science
Volume	6
Issue number	3
DOIs	https://doi.org/10.1007/BF01165470
State	Published - Sep 1995

Keywords

Rhenium
cluster
metallocycle

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10.1007/BF01165470

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@article{4833856ea8fc440e919e05b87eb67d27,

title = "A new rectangular Re4 cluster compound of the metallocyclodiyne Type",

abstract = "The compound (n-Bu4N)2[Re4Cl8(μ-Cl)2(μ-O)2 · 2THF] has been prepared from (n-Bu4N)2 Re2Cl8 by refluxing it in wet trifluoroacetic acid. It forms brown, block-shaped crystals in space group P \{Mathematical expression\}, with Z = 2 in a cell of dimensions:a = 11.748(1) {\AA}, b = 16.847(3) {\AA}, c = 16.953(3) {\AA}, α = 97.53(1)°β = 106.49(1)° γ = 101.25(1)°V = 3093(1) {\AA}3. There are two independent but practically identical tetranuclear anions, each on a crystallographic inversion center. The short, unbridged Re-Re edges, to which triple bonds are assigned have lengths of 2.280(1) {\AA} and 2.276(1) {\AA} and the longer edges, each with a μ-Cl and a μ-O atom have lengths of 2.611(1) {\AA} and 2.615(1) {\AA}, for molecules 1 and 2 respectively. This anion completes a series going from [Re4Cl8(μ-O)2(μ-OMe)2]2- through [Re4Cl8(μ-O)2(μ-OMe)(μ-Cl)]2- to the present [Re4Cl8(μ-O)2(μ-Cl)2]2-. These metallocyclobutadiynes can be viewed as products of the 2,2-cycloaddition of two Re-Re quadruple bonds, but the mechanistic details of how they arise remain obscure.",

keywords = "Rhenium, cluster, metallocycle",

author = "Cotton, \{F. Albert\} and Dikarev, \{Evgeny V.\}",

year = "1995",

month = sep,

doi = "10.1007/BF01165470",

language = "English",

volume = "6",

pages = "411--419",

journal = "Journal of Cluster Science",

issn = "1040-7278",

publisher = "Springer New York",

number = "3",

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TY - JOUR

T1 - A new rectangular Re4 cluster compound of the metallocyclodiyne Type

AU - Cotton, F. Albert

AU - Dikarev, Evgeny V.

PY - 1995/9

Y1 - 1995/9

N2 - The compound (n-Bu4N)2[Re4Cl8(μ-Cl)2(μ-O)2 · 2THF] has been prepared from (n-Bu4N)2 Re2Cl8 by refluxing it in wet trifluoroacetic acid. It forms brown, block-shaped crystals in space group P {Mathematical expression}, with Z = 2 in a cell of dimensions:a = 11.748(1) Å, b = 16.847(3) Å, c = 16.953(3) Å, α = 97.53(1)°β = 106.49(1)° γ = 101.25(1)°V = 3093(1) Å3. There are two independent but practically identical tetranuclear anions, each on a crystallographic inversion center. The short, unbridged Re-Re edges, to which triple bonds are assigned have lengths of 2.280(1) Å and 2.276(1) Å and the longer edges, each with a μ-Cl and a μ-O atom have lengths of 2.611(1) Å and 2.615(1) Å, for molecules 1 and 2 respectively. This anion completes a series going from [Re4Cl8(μ-O)2(μ-OMe)2]2- through [Re4Cl8(μ-O)2(μ-OMe)(μ-Cl)]2- to the present [Re4Cl8(μ-O)2(μ-Cl)2]2-. These metallocyclobutadiynes can be viewed as products of the 2,2-cycloaddition of two Re-Re quadruple bonds, but the mechanistic details of how they arise remain obscure.

AB - The compound (n-Bu4N)2[Re4Cl8(μ-Cl)2(μ-O)2 · 2THF] has been prepared from (n-Bu4N)2 Re2Cl8 by refluxing it in wet trifluoroacetic acid. It forms brown, block-shaped crystals in space group P {Mathematical expression}, with Z = 2 in a cell of dimensions:a = 11.748(1) Å, b = 16.847(3) Å, c = 16.953(3) Å, α = 97.53(1)°β = 106.49(1)° γ = 101.25(1)°V = 3093(1) Å3. There are two independent but practically identical tetranuclear anions, each on a crystallographic inversion center. The short, unbridged Re-Re edges, to which triple bonds are assigned have lengths of 2.280(1) Å and 2.276(1) Å and the longer edges, each with a μ-Cl and a μ-O atom have lengths of 2.611(1) Å and 2.615(1) Å, for molecules 1 and 2 respectively. This anion completes a series going from [Re4Cl8(μ-O)2(μ-OMe)2]2- through [Re4Cl8(μ-O)2(μ-OMe)(μ-Cl)]2- to the present [Re4Cl8(μ-O)2(μ-Cl)2]2-. These metallocyclobutadiynes can be viewed as products of the 2,2-cycloaddition of two Re-Re quadruple bonds, but the mechanistic details of how they arise remain obscure.

KW - Rhenium

KW - cluster

KW - metallocycle

UR - https://www.scopus.com/pages/publications/0000371874

U2 - 10.1007/BF01165470

DO - 10.1007/BF01165470

M3 - Article

SN - 1040-7278

VL - 6

SP - 411

EP - 419

JO - Journal of Cluster Science

JF - Journal of Cluster Science

IS - 3

ER -

A new rectangular Re₄ cluster compound of the metallocyclodiyne Type

Abstract

Keywords

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