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The preparation of beta-diketiminato...

Buffone, Gerald Philip, Jr.

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The preparation of beta-diketiminato organochromium complexes for homogeneous olefin polymerization catalysis.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The preparation of beta-diketiminato organochromium complexes for homogeneous olefin polymerization catalysis./
Author:	Buffone, Gerald Philip, Jr.
Description:	237 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6619.
Contained By:	Dissertation Abstracts International66-12B.
Subject:	Chemistry, Organic. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3200541
ISBN:	9780542458064

The preparation of beta-diketiminato organochromium complexes for homogeneous olefin polymerization catalysis.
Buffone, Gerald Philip, Jr.

The preparation of beta-diketiminato organochromium complexes for homogeneous olefin polymerization catalysis. - 237 p.

Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6619.

Thesis (Ph.D.)--University of Delaware, 2006.

This dissertation describes research on paramagnetic beta-diketiminato chromium complexes, and in particular, the synthesis and olefin polymerization reactivity of cationic CrIII alkyl complexes as homogeneous models for the Phillips catalyst, i.e. CrO3/SiO2.

ISBN: 9780542458064Subjects--Topical Terms:

516206
Chemistry, Organic.

The preparation of beta-diketiminato organochromium complexes for homogeneous olefin polymerization catalysis.
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100 1 $a Buffone, Gerald Philip, Jr. $3 1916451
245 1 4 $a The preparation of beta-diketiminato organochromium complexes for homogeneous olefin polymerization catalysis.
300 $a 237 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6619.
500 $a Adviser: Klaus H. Theopold.
502 $a Thesis (Ph.D.)--University of Delaware, 2006.
520 $a This dissertation describes research on paramagnetic beta-diketiminato chromium complexes, and in particular, the synthesis and olefin polymerization reactivity of cationic CrIII alkyl complexes as homogeneous models for the Phillips catalyst, i.e. CrO3/SiO2.
520 $a Chapter 1 discusses the synthesis and reactivity of the cationic chromium alkyl complex [(2,6-Me2Ph)2nacnacCr(OEt2)CH 2SiMe3]+ BARF- (39). Catalyst 39 is a homogeneous model for the Phillips olefin polymerization catalyst.
520 $a In Chapter 2, we have investigated the synthesis of CrII alkyl complexes as precursors to three coordinate chromium alkyl polymerization catalysts. The attempted alkylation of [(2,6-iPr2Ph) 2nacnacCr(mu-Cl)]2 (36) with allyl magnesium chloride gave an allyl complex, i.e. (2,6-iPr2Ph) 2nacnacCr(eta3-Allyl) (57). The pyridine derivative [(2,6-iPr2Ph)2nacnacCr(py)Cl] (59) was synthesized in an effort to discover an efficient route to the proposed three-coordinate "base free" polymerization catalyst [(2,6- iPr2Ph)2nacnacCr (CH2Si(CH3 )3)]+ BARF- (54). The transformation to 59 was achieved via treatment of 36 with two equivalents of pyridine.
520 $a Chapter 3 reports the synthesis of a novel class of nacnac chromium "internal base alkyl" (IBA) complexes. Lithium-hydrogen exchange reactions between tert-butyl lithium and the corresponding alkoxytrimethylsilane provided the IBA precursors (EtO)(CH3)2SiCH2Li (75) and (tBuO)(CH3)2SiCH2Li ( 77). The reaction of 37 with two equivalents of IBA anion 77 yielded the IBA complex (2,6-Me2Ph)2nacnacCr(CH 2Si(OtBu)(CH3)2) 2 (86). Attempted protolysis of 86 with one equivalent of H(Et2O)2BARF did not yield a stable cationic chromium IBA complex, i.e. [(2,6-Me2Ph)2nacnacCr(CH 2Si(OtBu)(CH3)2)]+ BARF (87). (Abstract shortened by UMI.)
590 $a School code: 0060.
650 4 $a Chemistry, Organic. $3 516206
650 4 $a Chemistry, Inorganic. $3 517253
650 4 $a Chemistry, Polymer. $3 1018428
690 $a 0490
690 $a 0488
690 $a 0495
710 2 0 $a University of Delaware. $3 1017826
773 0 $t Dissertation Abstracts International $g 66-12B.
790 1 0 $a Theopold, Klaus H., $e advisor
790 $a 0060
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3200541