Strukturen der mittleren Ringverbindungen. IV. 1, 6‐<i>trans</i>‐Diaminocyclodecan‐dihydrochlorid, trikline Modifikation

Abstract

Abstract 1,6‐ trans ‐diaminocyclodecane dihydrochloride crystallizes in triclinic and monoclinic modifications. The structure of the triclinic form with a = 9,02; b = 6,19; c = 6,20 Å; α = 96,7°; β = 99,3°; γ = 108,1°; space group P 1 ; Z = 1, has been determined by analysis of the (001) and (010) projections and the conformation of the cyclodecane ring thereby established. Although the molecule, and its environment, is crystallographically only centrosymmetric, the carbon skeleton does not deviate significantly from the higher 2/m (C 2h ) symmetry. Of the torsion angles around the ring, 8 are close to 60° (syn‐skew) the remaining 2 being 156° (nearly anti‐planar). Some stereochemical implications of the cyclodecane conformation are briefly mentioned.