Structure of syn-1-tert-butyl-4-(4-tert-butylcyclohexylidene)cyclohexane

Abstract

Abstract. C20H36 , Mr=276"3, triclinic,

Cyclohexanone semicarbazone and 4-tert-butylcyclohexanone semicarbazone

“…In BCSC, the values of 108.2 (5) ° for C(3)---C(4)---C(5), 114.6(5) ° for C(3)--C(4)--C(8)and 114.5(5) ° for C(5)--C(4)--C(8) show that the steric strain caused by the presence of a bulky substituent is minimized by slight deformations in the skeleton of the sixmembered ring. A similar angular deformation of the cyclohexane ring has been observed in many other 4-tert-butylcyclohexane derivatives (van Koningsveld, 1972;James & Grainger, 1972;Chiaroni, Riche & Pascard-Billy, 1974;Lectard, Lichanot, Metras, Gaultier & Hauw, 1975;Doesburg, Petit & Merckx, 1982;Reetz, Schwellnus, Hiibner, Massa & Schmidt, 1983;van Koningsveld & Jansen, 1984;Labar, Krier, Norberg, Evrard & Durant, 1985;Mariezcurrena & Fornaro, 1988 (Burkert & Allinger, 1982) and with those found from the CSD for similar compounds (van Koningsveld & Jansen, 1984).…”