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[Cu(H 2 O)(C 5 H 14 N 2 ) 2 ][VO 3 ] 2 – A Metavanadate Containing Right‐ and Left‐Handed Helical Chains
Author(s) -
Wutkowski Adam,
Näther Christian,
Bensch Wolfgang
Publication year - 2009
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200801416
Subject(s) - crystallography , ammonium metavanadate , vanadium , crystal structure , chemistry , materials science , stereochemistry , inorganic chemistry
The new metavanadate [Cu(H 2 O)(C 5 H 14 N 2 ) 2 ][VO 3 ] 2 (C 5 H 14 N 2 is 2,2‐dimethylpropyldiamine) ( 1 ) was synthesized under solvothermal conditions. The compound crystallizes in the rhombohedral space group R 3 m with a = 28.6984(15), c = 6.4309(3), V = 4586.9(4) Å 3 , Z = 9. The main structural motifs are helical metavanadate {VO 3 } n n – chains made by corner‐sharing [VO 4 ] 3– tetrahedra and [Cu(H 2 O)(C 5 H 14 N 2 ) 2 ] 2+ complexes with the Cu 2+ ion being in a distorted square‐pyramidal coordination environment. The complexes are located between left‐ and right‐handed metavanadate chains.The arrangement of the chains and the [Cu(H 2 O)(C 5 H 14 N 2 ) 2 ] 2+ complexes generates channels with liphophilic walls running along [001]. It seems that the orientation of the [Cu(H 2 O)(C 5 H 14 N 2 ) 2 ] 2+ moieties is fixed between the metavanadate chains by strong hydrogen bonding interactions. This special arrangement prevents Cu–O bond formation as observed in many Cu 2+ containing metavanadate compounds. The compound decomposes in at least three steps. The optical bandgap was determined to 3.04 eV.