The Library
trans-dioxocyclam (1,4,8,11-tetraazacyclotetradecane-2,9-dione) dihydrate and its Ni-II complex
Tools
UNSPECIFIED (2001) trans-dioxocyclam (1,4,8,11-tetraazacyclotetradecane-2,9-dione) dihydrate and its Ni-II complex. ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 57 (Part 4). pp. 359-362. ISSN 0108-2701.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Abstract
The crystal structures are reported of trans-dioxocyclam dihydrate, C10H20N4O2. 2H(2)O, a structural isomer of the well known cis-dioxocyclam, and of its novel Ni complex, (1,4,8,-11-tetraazacyclotetradecane-2,9-dionato-kappa N-4)nickel(II) dihydrate, [Ni(C10H18N4O2)]. 2H(2) O, the first example of a transition metal complex of this ligand. Both molecules lie on crystallographic centres of inversion. The free ligand has two of its N atoms turned outwards from the ring and hydrogen bonded to water molecules. A major conformational change takes place in the complex in which the ligand binds in a trans tetradentate fashion, as suggested by the electronic spectrum. The nickel(II) ion is low spin, although the electronic spectrum of the complex in water indicates an equilibrium mixture of low-spin and high-spin species. The irreversible electrochemical oxidation of [NiL1] (L-1 is deprotonated transdioxocyclam, C10H18N4O2) in water occurs at a potential of 0.964 V [versus SHE (standard hydrogen electrode)], which is very similar to that for the Ni-cis-dioxocyclam complex.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QD Chemistry | ||||
Journal or Publication Title: | ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS | ||||
Publisher: | MUNKSGAARD INT PUBL LTD | ||||
ISSN: | 0108-2701 | ||||
Official Date: | 15 April 2001 | ||||
Dates: |
|
||||
Volume: | 57 | ||||
Number: | Part 4 | ||||
Number of Pages: | 4 | ||||
Page Range: | pp. 359-362 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |