Isolation and structural characterization of di- and tetra-protonated forms of the macrocyclic hexaamine trans-6,13-dimethyl-1,4,8-11-tetraazacyclodecane-6,13-diamine

Bernhardt, Paul V., Lawrance, Geoffrey A., Skelton, Brian W. and White, Allan H. (2007) Isolation and structural characterization of di- and tetra-protonated forms of the macrocyclic hexaamine trans-6,13-dimethyl-1,4,8-11-tetraazacyclodecane-6,13-diamine. Zeitschrift Fur Anorganische Und Allgemeine Chemie, 633 7: 1036-1039. doi:10.1002/zaac.200700055


Author Bernhardt, Paul V.
Lawrance, Geoffrey A.
Skelton, Brian W.
White, Allan H.
Title Isolation and structural characterization of di- and tetra-protonated forms of the macrocyclic hexaamine trans-6,13-dimethyl-1,4,8-11-tetraazacyclodecane-6,13-diamine
Formatted title
Isolation and structural characterization of di- and tetra-protonated forms of the macrocyclic hexaamine trans-6,13-dimethyl-1,4,8-11-tetraazacyclodecane-6,13-diamine
Journal name Zeitschrift Fur Anorganische Und Allgemeine Chemie   Check publisher's open access policy
ISSN 0044-2313
Publication date 2007-02-02
Sub-type Article (original research)
DOI 10.1002/zaac.200700055
Open Access Status
Volume 633
Issue 7
Start page 1036
End page 1039
Total pages 4
Place of publication Weinheim
Publisher Wiley-v C H Verlag Gmbh
Language eng
Subject 250105 Structural Chemistry
C1
780103 Chemical sciences
Formatted abstract
Cations derived by protonation of the ligand title compound (L1) have been structurally characterized in their di- and tetra- protonated forms in the salts [H2L1][ClO4]2·2H2O and [H4L1][ZnCl4]2·4H2O. In both structures, one half of the formula unit comprises the asymmetric unit of the structure, the macrocycle being centrosymmetric, with the two macrocycles adopting similar conformations. In both salts, a pair of diagonally opposed macrocyclic secondary amine groups are protonated; in the [H4L1]4+ salt, the additional pair of protons are accommodated on the exocyclic pendant amine groups. The dispositions of the pendent amines differ between the two structures, being equatorial with respect to the macrocyclic ring in the [H2L1]2+ salt, and axial in the [H4L1]4+ salt. In other structurally characterized compounds containing [H4L1]4+ the equatorial disposition was found in the ferricyanide adduct, while in the tetraperchlorate salt the axial disposition was identified. The differences in disposition of the exocyclic groups are ascribed to the extensive H-bonding in the lattices.
Keyword Chemistry, Inorganic & Nuclear
X-ray crystal structure
macrocycle
hydrogen-bonds
Crystal-structure
Coordination
6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane-6,13-diamine
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Tue, 19 Feb 2008, 03:16:46 EST