A study of some organic and organometallic stereochemical problems by crystallographic direct methods
Degree GrantorUniversity of Canterbury
Degree NameDoctor of Philosophy
The crystal and molecular structures of five compounds are described this thesis. Of the five, one is the organometallic cobalt carbonyl cluster compound, bis(methinyltricobaltenneacarbonyl), [CCo₃(CO)₉]₂. The other four are wholly organic and are classed as all 'light atom' structures. The compounds studied were chosen primarily because they were suitable subjects for the use of particular techniques of structure analysis which were new to this laboratory. Therefore, although each has considerable intrinsic interest, the five compounds are not in fact chemically related. The techniques referred to required the phasing of observed structure amplitudes using direct methods which involve statistical analyses of the X-ray reflection intensities. It was intended to develop practical procedures for applying these direct methods to crystallographic problems in this laboratory. This aim has been achieved as the symbolic addition procedure and the tangent formula have been used in solving all the structures reported here.