Structural characterization of the triply bonded dirhenium(II) complexes Re2Cl4(.mu.-Ph2PCH2PPh2)2 and .alpha.-Re2Cl4(Me2P(CH2)2PMe2)

Barder, Timothy J.; Cotton, F. Albert; Dunbar, Kim R.; Powell, Gregory L.; Schwotzer, Willi; Walton, Richard A.

doi:10.1021/ic00210a017

Cited by 51 publications

(14 citation statements)

References 9 publications

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“…24 The compound Re 2 Cl 4 -(dppm) 2 was prepared by an adaptation of the literature procedure. 25 In a typical reaction, 25 mL of reagent grade methanol was added to a flask containing Re 2 Cl 6 (PBu n 3 ) 2…”

Section: Methodsmentioning

confidence: 99%

Structural, electronic and magnetic properties of metal–metal bonded dinuclear rhenium complexes bridged by organocyanide acceptor ligands

et al. 2003

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The syntheses, spectroscopic properties, redox chemistry, and solid-state structures of products obtained from the reaction of Re 2 Cl 4 (dppm) 2 (dppm = bis(diphenylphosphino) methane) with the polycyano acceptors TCNQ (7,7,8,8tetracyanoquinodimethanido) and DM-DCNQI (2,5-dimethyl-N,NЈ-dicyanoquinonediimine) are described. The compounds [Re 2 Cl 4 (dppm) 2 ] 2 (µ-TCNQ), 1, and [Re 2 Cl 4 (dppm) 2 ] 2 (µ-DM-DCNQI), 2, have been prepared by reaction of two equivalents of Re 2 Cl 4 (dppm) 2 with TCNQ and DMDCNQI, respectively, in THF or CH 2 Cl 2 . A single-crystal X-ray crystallographic study of [Re 2 Cl 4 (dppm) 2 ] 2 (µ-TCNQ)ؒ10THF revealed the presence of a trans-µ 2 bidentate mode for the bridging TCNQ ligand that joins two Re 2 Cl 4 (dppm) 2 molecules through equatorial positions. In a similar fashion, the compound [Re 2 Cl 4 (dppm) 2 ] 2 (µ-DM-DCNQI)ؒ10THF consists of two Re 2 units coordinated to the two nitrile positions of the DM-DCNQI ligand. The electronic properties of both compounds are unusual in that they exhibit intense, broad absorptions that span the near-IR region and extend into the mid-IR. The electrochemistry of the compounds consists of numerous oxidation and reduction processes in the range of ϩ2.0 to Ϫ2.0 V as determined by cyclic voltammetry. Both 1 and 2 exhibit temperature independent paramagnetism (TIP) with large χ TIP values of 7.29 × 10 Ϫ3 and 6.23 × 10 Ϫ3 emu mol Ϫ1 , respectively.

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Section: Methodsmentioning

confidence: 99%

Structural, electronic and magnetic properties of metal–metal bonded dinuclear rhenium complexes bridged by organocyanide acceptor ligands

et al. 2003

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“…[55] The reduction of the Re 2 (III, III) core by a phosphine ligand is not unusual, as demonstrated by the synthesis of Re 2 Cl 4 (m-dppm) 2 from Re 2 Cl 6 (P-n-Bu 3 ) 2 , a two-electron reduction. [89,90] Magnetic susceptibility studies performed on Re 2 Cl 4 (m-dppm) 2 (m-C 6 H 5 C(O)NH) (1.45 B. M) and Re 2 Cl 4 (dppm) 2 (m-CH 3 C(O)NH) (1.34 B. M) confirmed the paramagnetic Re 2 (III, II) systems with one unpaired electron. [91] Reactions of Re 3 (m-Cl) 3 …”

Section: Introductionmentioning

confidence: 85%

Nitrile Hydrolysis Promoted by Rhenium(III) Metal-Metal Bonded Systems

Eglin

2002

Comments on Inorganic Chemistry

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“…The dirhenium complexes Re 2 (µ-O 2 CCH 3 )Cl 4 (µ-dppm) 2 (1), 2 cis-Re 2 (µ-O 2 CCH 3 ) 2 Cl 2 (µ-dppm) 2 (2) 2, 3 and Re 2 Cl 4 (µ-dppm) 3 (3), 4 and the dicarboxylate-bridged complexes [Re 1 were prepared by the literature methods. All carboxylic acids and other reagents were obtained from Aldrich Chemical Co., and used as received.…”

Section: Methodsmentioning

confidence: 99%

Assemblies of multiply bonded [Re2]n+ cores possessing bond orders of 3 or 3.5 that are linked by dicarboxylate bridges

Bera

Clérac

Fanwick

et al. 2002

J. Chem. Soc., Dalton Trans.

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An earlier study describing the exchange of the µ-acetato ligands of Re 2 (µ-O 2 CCH 3 )Cl 4 (µ-dppm) 2 (1) and cis-Re 2 (µ-O 2 CCH 3 ) 2 Cl 2 (µ-dppm) 2 (2) by dicarboxylic acids has been expanded to include reactions with the monocarboxylic acid isonicotinic acid, and the dicarboxylic acids adipic acid, 4,4Ј-biphenyldicarboxylic acid, fumaric acid, trans-1,4-cyclohexanedicarboxylic acid and 1,1Ј-ferrocenedicarboxylic acid. Further examples of complexes that are "dimers-of-dimers" and triangular supramolecular assemblies involving retention of the basic electronic and molecular structures of the dirhenium units present in 1 and 2 have been obtained. In addition, the dirhenium complexes Re 2 (µ-O 2 CC 6 H 4 N)Cl 4 (µ-dppm) 2 (7) and cis-Re 2 (µ-O 2 C 6 H 10 CO 2 Et) 2 Cl 2 (µ-dppm) 2 (11) have been isolated, as well as the trimetallic complex cis-Re 2 Cl 2 (µ-dppm) 2 [(µ-O 2 CC 5 H 4 ) 2 Fe] ( 14) that is formed from the reaction of 2 with (C 5 H 4 CO 2 H) 2 Fe. The crystal structures of 7, 11 and 14 are reported.

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Structural characterization of the triply bonded dirhenium(II) complexes Re2Cl4(.mu.-Ph2PCH2PPh2)2 and .alpha.-Re2Cl4(Me2P(CH2)2PMe2)

Cited by 51 publications

References 9 publications

Structural, electronic and magnetic properties of metal–metal bonded dinuclear rhenium complexes bridged by organocyanide acceptor ligands

Structural, electronic and magnetic properties of metal–metal bonded dinuclear rhenium complexes bridged by organocyanide acceptor ligands

Nitrile Hydrolysis Promoted by Rhenium(III) Metal-Metal Bonded Systems

Assemblies of multiply bonded [Re2]n+ cores possessing bond orders of 3 or 3.5 that are linked by dicarboxylate bridges

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