Controlling the Number of Metal Sites to Which a Polytertiary Phosphine Coordinates in Tungsten Carbonyls

Author

Rodney D. Borger, Eastern Illinois University

Degree Name

Master of Science (MS)

Semester of Degree Completion

1981

Thesis Director

Richard L. Keiter

Abstract

Judiciously selected coordinated fragments of Ph₂PCH₂CH₂PPhCH₂-CH₂PPh₂ [(OC)₅WPPh₂H, (OC)₅WPPh₂CH=CH₂ and (OC)₅WPPh(CH=CH₂)₂] were used to construct its five possible nonchelated pentacarbonyltungsten complexes. These are the trimetallic (OC)₅WPPh[CH₂CH₂PPh₂W(CO)₅]₂ and the two pairs of constitutional isomers, (OC)₅WPPh[CH₂CH₂PPh₂]₂ and (OC)₅WPPh₂CH₂CH₂PPhCH₂CH₂PPh₂, and PPh[CH₂CH₂PPh₂W(CO)₅]₂ and (OC)₅WPPh₂CH₂CH₂PPh[W(CO)₅]CH₂CH₂PPh₂. Their syntheses, based on free radical and base catalyzed addition reactions, demonstrate a successful approach to ligation control of a polydentate phosphorus ligand.

The reactions used to synthesize these complexes are as follows […]

The new complexes were characterized structurally by phosphorus-31 nuclear magnetic resonance and infrared spectroscopy and their purity established with elemental analyses.

Recommended Citation

Borger, Rodney D., "Controlling the Number of Metal Sites to Which a Polytertiary Phosphine Coordinates in Tungsten Carbonyls" (1981). Masters Theses. 2967.
https://thekeep.eiu.edu/theses/2967