Two solvatomorphic forms of a copper complex formulated as Cu(L)(ClO4)2.2(H2O) (I) and Cu(L)(ClO4)2 (II), where L is 3,10-meso-3,5,7,7,10,12,14,14-Octamethyl - 1,4,8,11 -tetraazatetradecane, C18H40N4.
CHANDRA NATH BABUL; SEBASTIAN SUAREZ; FABIO DOCTOROVICH; TAPASHI G. ROY; RICARDO BAGGIO
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS
WILEY-BLACKWELL PUBLISHING, INC
Lugar: Londres; Año: 2013 vol. 69 p. 689 - 689
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 described and compared with each other and with a third, already reported, anhydrous diastereomer, denoted (III). Both compounds present very similar centrosymmetic coordination environments, with the CuII cation lying on an inversion centre in a distorted 4+2 octahedral environment, defined by the macrocyclic N4 group in the equatorial sites and two perchlorate groups in trans-axial positions [one of the perchlorate ligands in (I) is partially disordered]. The most significant difference in molecular shape is seen in the orientation of the perchlorate anions, and the influence of this on the intramolecular hydrogen bonding is discussed. The (partially) hydrated state of (I) favours the formation of chains along , while the anhydrous character of (II) and (III) promotes loosely bound structures with low packing indices.