An X-ray Crystallographic Study of 1,4-Di[(<Emphasis Type="Italic">E</Emphasis>)-2-(<Emphasis Type="Italic">p</Emphasis>-tolyl)-1-diazenyl]piperazine |
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| Authors: | Vanessa Renee Little Valerio Bertolasi Keith Vaughan |
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| Institution: | (1) Department of Chemistry, Saint Mary’s University, Halifax, NS, B3H 3C3, Canada;(2) Dipartimento di Chimica and Centro di Strutturistica Diffrattometrica, Universita’ di Ferrara, Via L. Borsari, 46, 44100 Ferrara, Italy; |
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| Abstract: | Abstract The crystal structure of methyl 1,4-di(E)-2-(p-tolyl)-1-diazenyl]piperazine (4) has been determined by single crystal X-ray diffraction analysis. The bis-triazene (4) adopts a normal chair conformation in the piperazine ring, with puckering parameters : φ2 = −29(5)°, QT = 0.534(2) ? and θ2 = 177.0(2)°. The crystal structure of 4 is compared with the structure of the triazene (2a) and the closely related bis-triazenes (3 and 5a). The piperazine ring of 2a and 4 adopt a typical chair conformation, whereas the piperazine ring of 3 adopts an unusual pseudo-boat conformation. Crystal data: 4 C18H22N6, triclinic, space group P`1] P\overline{1} , a = 6.8925(2) ?, b = 7.8574(3) ?, c = 16.8856(8) ?, α = 103.103(2)°, β = 90.528(2)°, γ = 101.776(2)° and V = 870.44 (6) ?3, for Z = 2. |
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