Skip to main content

Diphenylacetylene and acetylene derivatives of tridecacarbonyltrimethylphosphinetetraosmium

Resource type
Thesis type
(Thesis) M.Sc.
Date created
2007
Authors/Contributors
Abstract
This thesis presents the synthesis and characterization of seven new tetraosmium-alkyne clusters. These clusters are derived from reactions of diphenylacetylene or acetylene with tridecacarbonyltrimethylphosphinetetraosmium. Reactions between C2Ph2 and Os4(CO)13(PMe3) have produced three new compounds: two isomers of Os4¬(μ4-η2-C2Ph2)(CO)11(PMe3) with a trimethylphosphine located on the “wingtip” or “hinge” Os atoms of the osmium core and; Os4(μ3-η2-C2Ph2)(CO)12(PMe3), which is the precursor to the “wingtip” isomer. Three synthetic routes are reported to produce Os4(μ3-η2-C2Ph2)(CO)12(PMe3), one route includes an interconversion between a four- and three- coordinate alkyne. Four new clusters have been characterized from the reaction of C2¬H2 and Os4(CO)13(PMe3). Of these, Os4[μ3-η2-(H)CC(H)}C(O)](CO)12(PMe3) has two isomers and exhibits an unusual bonding moiety, involving a coordinated alkyne bound to a carbonyl ligand; forming an alkyne bridging two Os atoms and a ketone functional group bound to a third Os. The other two clusters, Os4(μ3-η2-C2H2)(CO)12(PMe3) and Os4(μ4-η2-C2H2)(CO)11(PMe3), were produced by the systematic removal of carbonyl ligands.
Document
Copyright statement
Copyright is held by the author.
Permissions
The author has not granted permission for the file to be printed nor for the text to be copied and pasted. If you would like a printable copy of this thesis, please contact summit-permissions@sfu.ca.
Scholarly level
Language
English
Member of collection
Download file Size
etd3150.pdf 17.73 MB

Views & downloads - as of June 2023

Views: 10
Downloads: 0