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The structure of the title compound, C 21 H 40 N 4 ·2H 2 O, has been determined from synchrotron X-ray radiation data. The asymmetric unit comprises one 12-membered macropolycycle and two lattice water mol-ecules. The macropolycycle contains two cyclo-hexane rings and one 1,3-di-aza-cyclo-hexane ring, all in chair conformations. The C-N and C-C bond lengths are in the ranges 1.4526 (16)-1.4786 (17) and 1.517 (2)-1.5414 (17) Å, respectively. One intra-molecular N-H⋯N hydrogen bond helps to stabilize the mol-ecular conformation while medium-strength inter-molecular N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds involving the lattice water mol-ecules connect the components into a three-dimensional network.

acta crystallographica. section e, crystallographic communications

Crystal structure of 9,20-dimethyl-1,8,12,19-tetraazatetracyclo[17.3.1.0<sup>2,7</sup>.0<sup>13,18</sup>]tricosane dihydrate from synchrotron X-ray data

Crystal structure of 9,20-dimethyl-1,8,12,19-tetraazatetracyclo[17.3.1.02,7.013,18]tricosane dihydrate from synchrotron X-ray data

Crystal structure of 9,20-dimethyl-1,8,12,19-tetraazatetracyclo[17.3.1.0^2,7.0^13,18]tricosane dihydrate from synchrotron X-ray data