Two solvatomorphic forms of a copper complex formulated as Cu(L1)(ClO4)2?1.2H2O and Cu(L1)(ClO4)2, where L1 is 3,10-C-meso-3,5,7,7,10,12,14,14-octamethyl-1,4,8,11-tetraazacyclo-tetradecane

NATH, B.C.; SUÁREZ, S. A.; DOCTOROVICH, F.; ROY, T. G.; BAGGIO, R.

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2013 vol. C69 p. 689 - 695

0108-2701

Two copper complex solvatomorphs, namely (3,10-C-meso-3,5,7,7,10,12,14,14-octamethyl-1,4,8,11-tetraazacyclotetradecane)bis(perchlorato-O)copper(II) 1.2-hydrate, [Cu(ClO4)2-(C18H40N4)]1.2H2O, (I), and (3,10-C-meso-3,5,7,7,10,12,14,14-octamethyl-1,4,8,11-tetraazacyclotetradecane)bis(perchlorato-O)copper(II), [Cu(ClO4)2(C18H40N4)], (II), are describedand compared with each other and with a third, alreadyreported, anhydrous diastereomer, denoted (III). Bothcompounds present very similar centrosymmetic coordinationenvironments, with the CuII cation lying on an inversion centrein a distorted 4+2 octahedral environment, defined by themacrocyclic N4 group in the equatorial sites and twoperchlorate groups in trans-axial positions [one of theperchlorate ligands in (I) is partially disordered]. The mostsignificant difference in molecular shape is seen in theorientation of the perchlorate anions, and the influence ofthis on the intramolecular hydrogen bonding is discussed. The(partially) hydrated state of (I) favours the formation ofchains along [011], while the anhydrous character of (II) and(III) promotes loosely bound structures with low packingindices.