CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Australian Journal of Chemistry   
Australian Journal of Chemistry
Journal Banner
  An international journal for chemical science
blank image Search
blank image blank image
blank image
  Advanced Search

Journal Home
About the Journal
Editorial Structure
For Advertisers
Online Early
Current Issue
Just Accepted
All Issues
Virtual Issues
Special Issues
Research Fronts
Sample Issue
For Authors
General Information
Submit Article
Author Instructions
Open Access
For Referees
Referee Guidelines
Review an Article
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates
Library Recommendation

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter logo LinkedIn

Affiliated with RACI

Royal Australian Chemical Institute
Royal Australian
Chemical Institute


Article << Previous     |     Next >>   Contents Vol 40(5)

Cobalt(II) and Cobalt(III) Complexes of Pentaaza Macrocyclic Ligands. Isomeric Composition and Hydrolysis Reactions of the Complexes of Eight Ligands With 15-Membered to 20-Membered Macrocyclic Rings

NF Curtis, P Osvath and DC Weatherburn

Australian Journal of Chemistry 40(5) 811 - 827
Published: 1987


Synthesis and characterization of cobalt(III) complexes of the pentaaza macrocyclic ligands 1,4,7,10, 13-pentaazacyclopentadecane, ( cpad ), 1,4,7,10,13-pentaazacyclohexadecane, ( ched ), 1,4,7,10,14-pentaazacycloheptadecane, ( chad ), 1,4,7,11,14-pentaazacycloheptadecane, ( chbd ), 1,4,7,11, 15-pentaazacyclooctadecane, ( coad ), 1,4,8,11,15-pentaazacyclooctadecane, ( cobd ) are described. Of the different isomeric forms possible for each complex only one geometric isomer and one or two of the possible diastereoisomers have been isolated. The products of the induced acid hydrolysis reactions of the bromo and chloro complexes with these ligands have been identified by means of 13C n.m.r. spectroscopy. Nitrato complexes are commonly produced when the reaction proceeds in nitrate media. The reactions of the [Co( cpad )X]n+ and [Co( chbd )X]n+ complexes proceed with the apparent inversion of a coordinated nitrogen in strongly acid media. Cobalt(II) complexes of the ligands 1,4,8,12,16-pentaazacyclononadecane ( cnad ) and 1,5,9,13,17-pentaazacycloeicosane (ceic) were prepared. These complexes could not be oxidized to cobalt(III) complexes and the available evidence suggests that they are five-coordinate square-pyramidal complexes in the solid state and in solution.

Full text doi:10.1071/CH9870811

© CSIRO 1987

blank image
Subscriber Login

PDF (924 KB) $25
 Export Citation

Legal & Privacy | Contact Us | Help


© CSIRO 1996-2016