Organocobaloximes with mixed dioxime equatorial ligands: A convenient one-pot synthesis. X-ray structures and cis-trans influence studies

by Gupta, B. D.; Singh, V.; Yamuna, R.; Barclay, T.; Cordes, W.

A simple and general route to the synthesis of organocobaloxime with mixed dioximeligands,RCo(L)(dpgH)Py [L = dmgH and chgH] (R = Me-Dee), has been described. The crystal structure of four complexes, ClCo(L)(dpgH)Py andMeCo(L)(dpgH)Py [L = dmgH and chgH], is reported. The structural study reveals that both the nonclassical C-(HO)-O-... as well as the classical O-(HO)-O-... intermolecular hydrogen bonding is present and leads to the formation of one-dimensional dimeric or polymeric structures. H-1 and C-13 NMR coordination shifts in the axial pyridine ligand show clear correlations with the chemical shift of the equatorial ligand. These correlations can be rationalized with the aid of the ring current model.

Journal
Organometallics
Volume
22
Issue
13
Year
2003
Start Page
2670-2678
URL
https://dx.doi.org/10.1021/om030089s
ISBN/ISSN
1520-6041; 0276-7333
DOI
10.1021/om030089s