TY - JOUR
T1 - Structure determination, spectroscopic characterization, and magnetic properties of a novel dinuclear copper(II) crown ether bipyridine complex
AU - Martens, Constantinus F.
AU - Schenning, Albertus P.H.J.
AU - Feiters, Martinus C.
AU - Heck, Jürgen
AU - Beurskens, Gezina
AU - Beurskens, Paul T.
AU - Steinwender, Erich
AU - Nolte, Roeland J.M.
PY - 1993/1/1
Y1 - 1993/1/1
N2 -
The synthesis of a novel ligand system (1) composed of two bipyridine units linked by a crown ether moiety is described. Addition of 2 equiv of [Cu(MeCN)
4
]BF
4
to 1 and subsequent oxidation yield a dinuclear µ-hydroxo-bridged copper(II) complex, [(1)Cu
2
(OH)
2
BF
4
]BF
4
·2H
2
O (2). The structure of this complex has been determined by X-ray crystallographic methods. Crystal data: triclinic, space group P1̅ (No. 2), a = 10.060(1)Å,b = 12.747(2) Å, c = 16.787(1) Å, a = 92.01(1)°, β = 103.01(2)°, y = 104.01(2)°. The Cu-O-Cu angles in complex 2 are nonequivalent (94.8 and 98.4°). One of the coppers is pentacoordinated; the other is hexacoordinated. Two molecules of 2 are linked by hydroxo ligands, forming a tetranuclear complex in which the Cu
2
(OH)
2
units have parallel but shifted positions. Magnetic susceptibility and EPR measurements suggest that complex 2 has a triplet ground state, with a triplet-singlet energy gap of 16 cm
−1
.
AB -
The synthesis of a novel ligand system (1) composed of two bipyridine units linked by a crown ether moiety is described. Addition of 2 equiv of [Cu(MeCN)
4
]BF
4
to 1 and subsequent oxidation yield a dinuclear µ-hydroxo-bridged copper(II) complex, [(1)Cu
2
(OH)
2
BF
4
]BF
4
·2H
2
O (2). The structure of this complex has been determined by X-ray crystallographic methods. Crystal data: triclinic, space group P1̅ (No. 2), a = 10.060(1)Å,b = 12.747(2) Å, c = 16.787(1) Å, a = 92.01(1)°, β = 103.01(2)°, y = 104.01(2)°. The Cu-O-Cu angles in complex 2 are nonequivalent (94.8 and 98.4°). One of the coppers is pentacoordinated; the other is hexacoordinated. Two molecules of 2 are linked by hydroxo ligands, forming a tetranuclear complex in which the Cu
2
(OH)
2
units have parallel but shifted positions. Magnetic susceptibility and EPR measurements suggest that complex 2 has a triplet ground state, with a triplet-singlet energy gap of 16 cm
−1
.
UR - http://www.scopus.com/inward/record.url?scp=0001330749&partnerID=8YFLogxK
U2 - 10.1021/ic00066a012
DO - 10.1021/ic00066a012
M3 - Article
AN - SCOPUS:0001330749
SN - 0020-1669
VL - 32
SP - 3029
EP - 3033
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 14
ER -