Heterometallic complexes involving iron(ii) and rhenium(vii) centers connected by μ-oxido bridges

Isabel S. Gonçalves; André D. Lopes; Tatiana R. Amarante; Filipe A.Almeida Paz; Nuno J.O. Silva; Martyn Pillinger; Sandra Gago; Fernando Palacio; Fritz E. Kühn; Carlos C. Romão

doi:10.1039/b913687h

Heterometallic complexes involving iron(ii) and rhenium(vii) centers connected by μ-oxido bridges

Isabel S. Gonçalves, André D. Lopes, Tatiana R. Amarante, Filipe A.Almeida Paz, Nuno J.O. Silva, Martyn Pillinger, Sandra Gago, Fernando Palacio, Fritz E. Kühn, Carlos C. Romão

Associate Professorship of Molecular Catalysis

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

5 Scopus citations

Abstract

The reaction of FeI₂ with two equivalents of AgReO₄ in acetonitrile leads to yellow, crystalline Fe(ReO₄) ₂(CH₃CN)₃ (1), and the treatment of 1 with four equivalents of CpFe(CO)₂CN gives orange, crystalline Fe(ReO ₄)₂[CpFe(CO)₂(CN)]₄ (2). Compound 2 can also be prepared in one step by the reaction of FeI₂, AgReO ₄ and CpFe(CO)₂CN in dichloromethane. The structure of 1 consists of infinite chains in which alternating {Fe(CH₃CN) ₄} and {Fe(ReO₄)₂(CH₃CN) ₂} units are linked by perrhenate anions to form a (-ReO ₂-O-Fe(ReO₄)₂(CH₃CN) ₂-O-ReO₂-O-Fe(CH₃CN)₄-O-) _n molecular wire. The structure of 2 shows a monomeric iron complex with a slightly distorted octahedral coordination environment consisting of four organometallic complexes coordinated in the equatorial plane via the cyanide groups and two monodentate perrhenates in the corresponding apical positions. Both compounds were further characterised in the solid state by IR spectroscopy, thermogravimetric analysis and magnetic susceptibility measurements. The magnetic data indicate that 1 behaves as a ferrimagnetic chain with 3D ordering below 8 K due to inter-chain interactions. Compound 2 has antiferromagnetic interactions within the Fe(ReO₄)₂[CpFe(CO) ₂(CN)]₄ clusters.

Original language	English
Pages (from-to)	10199-10207
Number of pages	9
Journal	Dalton Transactions
Issue number	46
DOIs	https://doi.org/10.1039/b913687h
State	Published - 1 Jan 2009

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@article{2bbfbf9a34c84428b3f6826dbf0fe1bd,

title = "Heterometallic complexes involving iron(ii) and rhenium(vii) centers connected by μ-oxido bridges",

abstract = "The reaction of FeI2 with two equivalents of AgReO4 in acetonitrile leads to yellow, crystalline Fe(ReO4) 2(CH3CN)3 (1), and the treatment of 1 with four equivalents of CpFe(CO)2CN gives orange, crystalline Fe(ReO 4)2[CpFe(CO)2(CN)]4 (2). Compound 2 can also be prepared in one step by the reaction of FeI2, AgReO 4 and CpFe(CO)2CN in dichloromethane. The structure of 1 consists of infinite chains in which alternating {Fe(CH3CN) 4} and {Fe(ReO4)2(CH3CN) 2} units are linked by perrhenate anions to form a (-ReO 2-O-Fe(ReO4)2(CH3CN) 2-O-ReO2-O-Fe(CH3CN)4-O-) n molecular wire. The structure of 2 shows a monomeric iron complex with a slightly distorted octahedral coordination environment consisting of four organometallic complexes coordinated in the equatorial plane via the cyanide groups and two monodentate perrhenates in the corresponding apical positions. Both compounds were further characterised in the solid state by IR spectroscopy, thermogravimetric analysis and magnetic susceptibility measurements. The magnetic data indicate that 1 behaves as a ferrimagnetic chain with 3D ordering below 8 K due to inter-chain interactions. Compound 2 has antiferromagnetic interactions within the Fe(ReO4)2[CpFe(CO) 2(CN)]4 clusters.",

author = "Gon{\c c}alves, {Isabel S.} and Lopes, {Andr{\'e} D.} and Amarante, {Tatiana R.} and Paz, {Filipe A.Almeida} and Silva, {Nuno J.O.} and Martyn Pillinger and Sandra Gago and Fernando Palacio and K{\"u}hn, {Fritz E.} and Rom{\~a}o, {Carlos C.}",

year = "2009",

month = jan,

day = "1",

doi = "10.1039/b913687h",

language = "English",

pages = "10199--10207",

journal = "Dalton Transactions",

issn = "1477-9226",

number = "46",

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TY - JOUR

T1 - Heterometallic complexes involving iron(ii) and rhenium(vii) centers connected by μ-oxido bridges

AU - Gonçalves, Isabel S.

AU - Lopes, André D.

AU - Amarante, Tatiana R.

AU - Paz, Filipe A.Almeida

AU - Silva, Nuno J.O.

AU - Pillinger, Martyn

AU - Gago, Sandra

AU - Palacio, Fernando

AU - Kühn, Fritz E.

AU - Romão, Carlos C.

PY - 2009/1/1

Y1 - 2009/1/1

N2 - The reaction of FeI2 with two equivalents of AgReO4 in acetonitrile leads to yellow, crystalline Fe(ReO4) 2(CH3CN)3 (1), and the treatment of 1 with four equivalents of CpFe(CO)2CN gives orange, crystalline Fe(ReO 4)2[CpFe(CO)2(CN)]4 (2). Compound 2 can also be prepared in one step by the reaction of FeI2, AgReO 4 and CpFe(CO)2CN in dichloromethane. The structure of 1 consists of infinite chains in which alternating {Fe(CH3CN) 4} and {Fe(ReO4)2(CH3CN) 2} units are linked by perrhenate anions to form a (-ReO 2-O-Fe(ReO4)2(CH3CN) 2-O-ReO2-O-Fe(CH3CN)4-O-) n molecular wire. The structure of 2 shows a monomeric iron complex with a slightly distorted octahedral coordination environment consisting of four organometallic complexes coordinated in the equatorial plane via the cyanide groups and two monodentate perrhenates in the corresponding apical positions. Both compounds were further characterised in the solid state by IR spectroscopy, thermogravimetric analysis and magnetic susceptibility measurements. The magnetic data indicate that 1 behaves as a ferrimagnetic chain with 3D ordering below 8 K due to inter-chain interactions. Compound 2 has antiferromagnetic interactions within the Fe(ReO4)2[CpFe(CO) 2(CN)]4 clusters.

AB - The reaction of FeI2 with two equivalents of AgReO4 in acetonitrile leads to yellow, crystalline Fe(ReO4) 2(CH3CN)3 (1), and the treatment of 1 with four equivalents of CpFe(CO)2CN gives orange, crystalline Fe(ReO 4)2[CpFe(CO)2(CN)]4 (2). Compound 2 can also be prepared in one step by the reaction of FeI2, AgReO 4 and CpFe(CO)2CN in dichloromethane. The structure of 1 consists of infinite chains in which alternating {Fe(CH3CN) 4} and {Fe(ReO4)2(CH3CN) 2} units are linked by perrhenate anions to form a (-ReO 2-O-Fe(ReO4)2(CH3CN) 2-O-ReO2-O-Fe(CH3CN)4-O-) n molecular wire. The structure of 2 shows a monomeric iron complex with a slightly distorted octahedral coordination environment consisting of four organometallic complexes coordinated in the equatorial plane via the cyanide groups and two monodentate perrhenates in the corresponding apical positions. Both compounds were further characterised in the solid state by IR spectroscopy, thermogravimetric analysis and magnetic susceptibility measurements. The magnetic data indicate that 1 behaves as a ferrimagnetic chain with 3D ordering below 8 K due to inter-chain interactions. Compound 2 has antiferromagnetic interactions within the Fe(ReO4)2[CpFe(CO) 2(CN)]4 clusters.

UR - http://www.scopus.com/inward/record.url?scp=70450179166&partnerID=8YFLogxK

U2 - 10.1039/b913687h

DO - 10.1039/b913687h

M3 - Article

AN - SCOPUS:70450179166

SN - 1477-9226

SP - 10199

EP - 10207

JO - Dalton Transactions

JF - Dalton Transactions

IS - 46

ER -

Heterometallic complexes involving iron(ii) and rhenium(vii) centers connected by μ-oxido bridges

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