J. Bart, M. Calcaterra, K. Woode
1984
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0
Influential Citations
4
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Journal
Dyes and Pigments
Abstract
Abstract The structure of 2,6-dichloro-4′- N , N -diethylaminoazobenzene has been determined from X-ray diffractometer data: C 16 H 17 Cl 2 N 3 , MW = 322·2, monoclinic, P 2 1 / n , a = 11·160 (2), b = 12·066 (2), c = 13·633 (3) A, β = 116·46 (2)°, V = 1643·5 A 3 , Z = 4, D c = 1·30 g cm −3 , F (000) = 672, λ(MoKα) = 0·71069 A, μ(MoKα) = 3·94 cm −1 . The structure was solved by direct methods and refined to R = 0·073 for 1495 independent reflexions. The molecule is non-planar with a dihedral angle of 87·8° between the phenyl rings. The effects of substituents on the aromatic ring geometry are discussed. Significant molecular parameters are: NN, 1·164 (9) A; mean ClC, 1·741 (6) A; mean CN(azo), 1·487 (9) A; NNC, 112·4 (2)° and 109·1 (2)°; NCC ( cis relative to NN), 125·5 (3)° and 122·4 (2)°; NCC ( trans relative to NN) 114·0 (3)° and 119·5 (3)°; mean CC(Cl)C, 122·3 (3)°.