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[V 15 Ge 6 O 42 S 6 (H 2 O)] 12– , a Thiogermanatopolyoxovanadate Cluster Featuring the Spin Topology of the Molecular Magnet [V 15 As 6 O 42 (H 2 O)] 6–
Author(s) -
Wang Jing,
Näther Christian,
Kögerler Paul,
Bensch Wolfgang
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201101187
Subject(s) - chemistry , crystallography , monoclinic crystal system , denticity , protonation , ion , cluster (spacecraft) , crystal structure , ligand (biochemistry) , stereochemistry , amine gas treating , biochemistry , receptor , organic chemistry , computer science , programming language
The new compound [Co(tren)(trenH 2 )] 2 [{Co(tren)} 2 V 15 Ge 6 O 42 S 6 (H 2 O)] · 9H 2 O [ 1 , tren = tris(2‐aminoethyl)amine] has been obtained under solvothermal conditions and features the unique thiogermanatovanadatopolyoxoanion[V IV 15 Ge IV 6 O 42 S 6 (H 2 O)] 12– as the main structural motif. Compound 1 crystallizes in the monoclinic space group P 2 1 / c with a = 15.4711(2), b = 26.4031(4), c = 26.7213(4) Å, V = 10874.2(3) Å 3 , and Z = 4. The [V 15 Ge 6 O 42 S 6 (H 2 O)] 12– cluster anion displays the spin topology reported for the molecular magnets [V IV 15 As III 6 O 42 (H 2 O)] 6– and [V IV 15 Sb III 6 O 42 ] 6– and therefore represents a new member of the {V 15 E 6 } family, which has allowed us to study the magnetic exchange interactions between the vanadyl (d 1 ) groups of the geometrically frustrated central V 3 triangle, which is sandwiched between strongly antiferromagnetically coupled V 6 hexagons. The cluster shell is expanded by two {Co(tren)} 2+ ‐based complexes through Co–S bonds, which reduce the high negative charge of the anion. The Co 2+ ions in the [Co(tren)(trenH 2 )] 4+ countercations are coordinated to one tetradentate tren and a monodentate, doubly protonated tren ligand.