Studies involving mixed donor macrocyclic ligands. Comparative X-ray diffraction, infrared, and fast atom bombardment mass spectrometric studies of the nickel thiocyanate complexes of three O2N3-donor macrocycles
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 11,p. 2537-2542
- https://doi.org/10.1039/dt9870002537
Abstract
Minor changes in the substitution pattern of the backbone of a 17-membered macrocyclic ring incorporating O2N3 donor atoms have been demonstrated to have a significant influence on the ligand co-ordination modes in the corresponding nickel thiocyanate complexes. Comparative i.r. and fast atom bombardment (f.a.b.) source mass spectrometry as well as X-ray diffraction studies (on three complexes) have been used to elucidate the nature of the species formed. A variety of structures occurs for these complexes: three of the complexes are monomeric and incorporate terminal isothiocyanato groups with the 1,4,7-triazaheptane macrocyclic fragment co-ordinating in either a facial or meridional manner. Two forms of the complex of the unsubstituted macrocycle were isolated. The more insoluble form is dimeric and incorporates unusual N-bridged isothiocyanato groups. The combination of i.r. and f.a.b. mass spectrometric studies has proven to be especially useful for structural elucidation in systems of the type investigated.Keywords
This publication has 0 references indexed in Scilit: