Synthesis, structure and magnetic properties of an asymmetric dinuclear oxocitratovanadate(IV) complex

Suzana Burojevic; Itzhak Shweky; Avi Bino; David A. Summers; Robert C. Thompson

doi:10.1016/s0020-1693(96)05254-1

Synthesis, structure and magnetic properties of an asymmetric dinuclear oxocitratovanadate(IV) complex

Suzana Burojevic
, Itzhak Shweky
, Avi Bino^*
, David A. Summers
, Robert C. Thompson

^*Corresponding author for this work

Institute of Chemistry

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

54 Scopus citations

Abstract

Evaporation of an aqueous solution containing VO²⁺, citric acid and neocuproine (2,9-dimethyl-1,10-phenanthroline = neo) produces blue crystals of (Hneo)₃[(VO)₂(cit)(Hcit)]·4H₂O (1). An X-ray structural analysis showed that 1 consists of a discrete, asymmetric, dinuclear oxocitratovanadate(IV) complex and three neocuproinium cations. The complex contains one six-coordinate V(IV) atom with a distorted octahedral geometry and one five-coordinate V(IV) atom with a distorted square pyramidal geometry. The two metal atoms are bridged by two alkoxide oxygen atoms of one cit^4- group and one Hcit^3- group which has one protonated, non-coordinating carboxylic group. The V⋯V distance was found to be 2.949(1) Å. Compound 1 is orthorhombic, space group Pca2₁, with a = 22.223(3), b = 10.499(1), c = 22.818(2) Å, V = 5324(1) Å³ and Z = 4. Magnetic susceptibility measurements of a powdered sample of 1 over the range 2-300 K showed a very strong antiferromagnetic coupling between the two d¹ systems with -J value of 212 cm^-1.

Original language	English
Pages (from-to)	75-79
Number of pages	5
Journal	Inorganica Chimica Acta
Volume	251
Issue number	1-2 PART II
DOIs	https://doi.org/10.1016/s0020-1693(96)05254-1
State	Published - 1 Oct 1996

Keywords

Asymmetric complexes
Citrate complexes
Crystal structures
Dinuclear complexes
Vanadyl complexes

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10.1016/s0020-1693(96)05254-1

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@article{a583ecf6f38e4838aec826d98f8a3879,

title = "Synthesis, structure and magnetic properties of an asymmetric dinuclear oxocitratovanadate(IV) complex",

abstract = "Evaporation of an aqueous solution containing VO2+, citric acid and neocuproine (2,9-dimethyl-1,10-phenanthroline = neo) produces blue crystals of (Hneo)3[(VO)2(cit)(Hcit)]·4H2O (1). An X-ray structural analysis showed that 1 consists of a discrete, asymmetric, dinuclear oxocitratovanadate(IV) complex and three neocuproinium cations. The complex contains one six-coordinate V(IV) atom with a distorted octahedral geometry and one five-coordinate V(IV) atom with a distorted square pyramidal geometry. The two metal atoms are bridged by two alkoxide oxygen atoms of one cit4- group and one Hcit3- group which has one protonated, non-coordinating carboxylic group. The V⋯V distance was found to be 2.949(1) {\AA}. Compound 1 is orthorhombic, space group Pca21, with a = 22.223(3), b = 10.499(1), c = 22.818(2) {\AA}, V = 5324(1) {\AA}3 and Z = 4. Magnetic susceptibility measurements of a powdered sample of 1 over the range 2-300 K showed a very strong antiferromagnetic coupling between the two d1 systems with -J value of 212 cm-1.",

keywords = "Asymmetric complexes, Citrate complexes, Crystal structures, Dinuclear complexes, Vanadyl complexes",

author = "Suzana Burojevic and Itzhak Shweky and Avi Bino and Summers, \{David A.\} and Thompson, \{Robert C.\}",

year = "1996",

month = oct,

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doi = "10.1016/s0020-1693(96)05254-1",

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T1 - Synthesis, structure and magnetic properties of an asymmetric dinuclear oxocitratovanadate(IV) complex

AU - Burojevic, Suzana

AU - Shweky, Itzhak

AU - Bino, Avi

AU - Summers, David A.

AU - Thompson, Robert C.

PY - 1996/10/1

Y1 - 1996/10/1

N2 - Evaporation of an aqueous solution containing VO2+, citric acid and neocuproine (2,9-dimethyl-1,10-phenanthroline = neo) produces blue crystals of (Hneo)3[(VO)2(cit)(Hcit)]·4H2O (1). An X-ray structural analysis showed that 1 consists of a discrete, asymmetric, dinuclear oxocitratovanadate(IV) complex and three neocuproinium cations. The complex contains one six-coordinate V(IV) atom with a distorted octahedral geometry and one five-coordinate V(IV) atom with a distorted square pyramidal geometry. The two metal atoms are bridged by two alkoxide oxygen atoms of one cit4- group and one Hcit3- group which has one protonated, non-coordinating carboxylic group. The V⋯V distance was found to be 2.949(1) Å. Compound 1 is orthorhombic, space group Pca21, with a = 22.223(3), b = 10.499(1), c = 22.818(2) Å, V = 5324(1) Å3 and Z = 4. Magnetic susceptibility measurements of a powdered sample of 1 over the range 2-300 K showed a very strong antiferromagnetic coupling between the two d1 systems with -J value of 212 cm-1.

AB - Evaporation of an aqueous solution containing VO2+, citric acid and neocuproine (2,9-dimethyl-1,10-phenanthroline = neo) produces blue crystals of (Hneo)3[(VO)2(cit)(Hcit)]·4H2O (1). An X-ray structural analysis showed that 1 consists of a discrete, asymmetric, dinuclear oxocitratovanadate(IV) complex and three neocuproinium cations. The complex contains one six-coordinate V(IV) atom with a distorted octahedral geometry and one five-coordinate V(IV) atom with a distorted square pyramidal geometry. The two metal atoms are bridged by two alkoxide oxygen atoms of one cit4- group and one Hcit3- group which has one protonated, non-coordinating carboxylic group. The V⋯V distance was found to be 2.949(1) Å. Compound 1 is orthorhombic, space group Pca21, with a = 22.223(3), b = 10.499(1), c = 22.818(2) Å, V = 5324(1) Å3 and Z = 4. Magnetic susceptibility measurements of a powdered sample of 1 over the range 2-300 K showed a very strong antiferromagnetic coupling between the two d1 systems with -J value of 212 cm-1.

KW - Asymmetric complexes

KW - Citrate complexes

KW - Crystal structures

KW - Dinuclear complexes

KW - Vanadyl complexes

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JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

IS - 1-2 PART II

ER -

Synthesis, structure and magnetic properties of an asymmetric dinuclear oxocitratovanadate(IV) complex

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