
%0 Journal Article
%A Black, DSC 
%A McLean, IA 
%T Ligand design and synthesis. II. Linear five-donor-atom compounds derived from 1,5-Dibromo-3-azapentane
%J Australian Journal of Chemistry
%D 1971/07/01
%V 24
%N 7
%P 1391-1399
%K 
%R https://doi.org/10.1071/CH9711391
%U https://www.publish.csiro.au/paper/CH9711391 
%X A series of linear, five-donor-atom compounds, with nitrogen, sulphur, and oxygen donor-atoms, has been prepared to examine the effects of steric crowding on the formation of octahedral complexes. 1,11-Diamino- 3,9-dithia-6-azaundecane (5) and 4-methyl-1,7-di(8?-quinolyl)-1,7- dithia-4-azaheptane (6) form octahedral complexes with Ni(ClO4)2 or Co(ClO4)2. An increase in the bulkiness of the ligand, as shown by 1,11- bis(dimethylamino)-3,9-dithia-6-azaundecane (7), led to the formation of five-coordinate or partially five-coordinate cobalt(II) and nickel(II) complexes. With 1,11-bis(diethylamino)-3,9-dithia-6- azaundecane (8), a very hindered ligand, no pure cobalt(II) or nickel(II) complexes could be isolated. Several other hindered compounds containing all sulphur, or sulphur and oxygen, central donor- atoms did not form pure complexes when treated with Co(ClO4)2 or Ni(ClO4)2. 
