Berg, Beckie E. (1979) [I.] Carbon monoxide reduction by sixteen electron d-zero tantalum complexes [II.] Acrylonitrile cyclodimerization by tris(triphenylphosphine) tetramethylene Ni(II). Master's thesis, California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:04072010-082613027
[Part I] The sixteen electon, d-zero complexes Ta(COT)Me_3 and (η^5-C_5Me_5)Ta(C_3H_5)Me_3 were prepared and treated with carbon monoxide. The prep of Ta(COT) Me_3 gave irreproducibly small yields and upon treatment with CO paramagnetic material was observed. The prep of (η^5-C_5Me_5)Ta(C_3H_5)Me_3 resulted in yellow crystals in a red oil and these could not be separated. (η ^5C_5Me_5)Ta(C_3H_4Me)Me_3 was then made. This complex decomposes to the trimethylene methane species (η^5-C_5Me_5)Ta(C_3H_3Me)Me_2, and upon treatment with CO gave an unknown white solid product. [Part II] Tris(triphenylphoshine) tetramethylene Ni(II) was made and treated with acrylonitrile. 1, 2 dicyanocyclobutane was produced in a cis:trans mixture of 45:55 and was isolated by preparative GC. The product was rarely observed and the reaction of nickel metallocycle with acrylonitrile was not catalyzed by acid, base, or Ni(O).
|Item Type:||Thesis (Master's thesis)|
|Degree Grantor:||California Institute of Technology|
|Division:||Chemistry and Chemical Engineering|
|Thesis Availability:||Restricted to Caltech community only|
|Defense Date:||29 June 1979|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||19 Apr 2010 18:24|
|Last Modified:||26 Dec 2012 03:24|
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