A novel transformation of a zirconium imido compound and the development of a new class of N3 donor heteroscorpionate ligand.
Reaction of the dimeric zirconium imido compound [Zr2(mu-NAr)2Cl4(THF)4] with tris(3,5-dimethylpyrazolyl)methyl silane very selectively gave [Zr{(Me2pz)2Si(Me)NAr}Cl3] (1), a highly active pre-catalyst for ethylene polymerisation; a more general and versatile route to N3 donor heteroscorpionate compounds was achieved via the protio ligand (Me2pz)2CHSi(Me)2N(H)iPr for which neutral and cationic organometallic Group 3 and 4 derivatives are reported (Ar = 2,6-C6H(3)iPr2).
Howe
Robert G
RG
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, UK.
Tredget
Cara S
CS
Lawrence
Sally C
SC
Subongkoj
Suparabhorn
S
Cowley
Andrew R
AR
Mountford
Philip
P
D002384:Catalysis; D018360:Crystallography, X-Ray; D005030:Ethylenes / Q000138:chemical synthesis / Q000737:chemistry; D007094:Imides / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011720:Pyrazoles / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D013237:Stereoisomerism; D015040:Zirconium / Q000737:chemistry*
D005030:Ethylenes; D007094:Imides; D008024:Ligands; D009942:Organometallic Compounds; D011720:Pyrazoles; D012821:Silanes; C518391:tris(3,5-dimethylpyrazolyl)methyl silane; C036216:ethylene; D015040:Zirconium