Sa. Li et al., Crystal structure of a 26-membered hexaaza macrocycle bearing hydroxyethylpendants containing p-xylyl spacers, J CHEM CRYS, 30(11), 2000, pp. 743-747
The new macrocyclic compound bearing hydroxyethyl pendant arms containing p
-xylyl spacers, 3,6,9,16,19,22-hexaaza-6,19-bis(2-hydroxyethyl)-tricyclo[22
,2,2,2(11.14)] triaconta-1,11,13,24,27,29-hexaene, crystallizes in the mono
clinic space group P2(1)/c with a = 8.700(2) Angstrom, b = 18.301(4) Angstr
om, c = 11.766(2) Angstrom, beta = 108.57(2)degrees. The two hydroxyethyl p
endants are at the opposite sides of the macrocyclic plane. Benzene rings i
n macrocycle are parallel and exist the pi-pi weak interaction with distanc
e of 4.28 Angstrom. The crystal packing of the macrocycle is stabilized by
the hydrogen bonds.