Title: Bidentate ligands of diolefin telomerization
Application Number: 02823386 Application Date: 2002.11.05
Publication Number: 1592725 Publication Date: 2005.03.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C07B37/02,C07C41/06,B01J31/24,C07F9/50,C07F9/6568
Applicant(s) Name: Shell Int Research Address:
Inventor(s) Name: Drent Eit, Van Ginkel Roelof
Attorney & Agent: long chuangong
Abstract:
     Process for the telomerization of a conjugated diene, wherein the conjugated diene is reacted with a compound containing an active hydrogen atom and having a formula R'-H in the presence of a telomerization catalyst based on: (a) a source of group VIII metal, (b) a bidentate ligand wherein the bidentate ligand has the general formula I R<1>R<2>M<1>-R-M<2>R<3>R<4> (I) wherein M<1 >and M<2 >are independently P, As or Sb; R<1>, R<2>, R<3 >and R<4 >independently represent a monovalent aliphatic group; or R<1>, R<2 >and M<1 >together and/or R<3>, R<4 >and M<2 >together independently represent an optionally substituted aliphatic cyclic group with at least 5 ring atoms, of which one is the M<1 >or M<2 >atom, respectively; R represents a bivalent organic bridging group; and novel bidentate diphosphines which can be used in this process.
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