THE PHENOMENON OF CONGLOMERATE CRYSTALLIZATION .33. COUNTERION EFFECTS ON CRYSTALLIZATION PATHWAY OF RACEMATE SOLUTIONS .4. THE CRYSTAL ANDMOLECULAR-STRUCTURE OF RACEMIC (H3O+)[CO(EN)2OX]CL2.H2O (I)
I. Bernal et al., THE PHENOMENON OF CONGLOMERATE CRYSTALLIZATION .33. COUNTERION EFFECTS ON CRYSTALLIZATION PATHWAY OF RACEMATE SOLUTIONS .4. THE CRYSTAL ANDMOLECULAR-STRUCTURE OF RACEMIC (H3O+)[CO(EN)2OX]CL2.H2O (I), Polyhedron, 12(10), 1993, pp. 1157-1162
(H3O+)[Co(en)2ox]Cl2.H2O (I), CoCl2O6N4C6H21, crystallizes as a racema
te in the monoclinic space group P2(1)/c (No. 14). Infinitely hydrogen
-bonded spiral strings of homochiral [Co(en)2ox]+ cations are formed w
hich are wrapped about the two-fold screw axis of the crystals. Adjace
nt spirals are held together by hydrogen bonds between the waters and
chlorides and the -NH2 hydrogens of the cations. Such an arrangement i
s also present in the conglomerate crystals of the [Co(en)2ox]Cl.4H2O
(II) and [Co(en)2ox] Br . H2O (III) derivatives; however, unlike II an
d III, which crystallize as conglomerates and all spiral strings are o
f the same helicity, in I adjacent spirals are of opposite helical chi
rality and related to one another by the inversion operation of the sp
ace group.