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Hexanuclear Niobium Cluster Complex Anions with Acetato Ligands on Intramolecular Bridging Sites: [Nb 6 Cl i 4 (OAc) i 8 Cl a 6 ] 2– and [Nb 6 (OAc) i 12 Cl a 6 ] 2–
Author(s) -
König Jonas,
Köckerling Martin
Publication year - 2020
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.202000173
Subject(s) - octahedron , chemistry , monoclinic crystal system , crystallography , ligand (biochemistry) , intramolecular force , cluster (spacecraft) , metal , atom (system on chip) , niobium , crystal structure , ion , stereochemistry , medicinal chemistry , biochemistry , receptor , organic chemistry , computer science , programming language , embedded system
From the reaction of [Nb 6 Cl 14 (H 2 O) 4 ] · 4H 2 O with acetic anhydride in the presence of an excess of ( n Bu 4 N)F the novel cluster compounds ( n Bu 4 N) 2 [Nb 6 Cl i 4 (OAc) i 8 Cl a 6 ] ( 1 ) and ( n Bu 4 N) 2 [Nb 6 (OAc) i 12 Cl a 6 ] ( 2 ) (OAc = acetato ligand) are obtained. They are the first examples of hexanuclear niobium cluster compounds with acetato ligands on the inner sites of the metal atom octahedron. The crucial role of the presence of fluoride ions in the synthesis is discussed. Each acetato ligand bridges in a μ 2 ‐η 1 ‐fashion with one O atom an edge of the metal atom octahedron. The monoclinic crystals of 1 consist of discrete ( n Bu 4 N) + cations and [Nb 6 Cl i 4 (OAc) i 8 Cl a 6 ] 2– cluster anions. They are oxidized by two electrons with respect to the cluster starting material. Besides the syntheses of 1 and 2 , the structure of 1 and spectral properties of both compounds are reported.