Reexamination of the photochemical oxidative decarbonylation of Cr(CO)6 by ortho-quinones: Low-temperature photolysis of Cr(CO)6 with ortho- and para-quinone isomers
Reactions of triphenylborane with photoexcited ketones and with diazodiarylmethanes
作者:Angeld Alberti、Gian Franco Pedulli
DOI:10.1016/0022-328x(85)80392-2
日期:1985.12
Aromatic ketones and diones when exposed to UV irradiation in the presence of triphenylborane give R2ĊOBPh2 radicals through an SH2 displacement of phenyl from BPh3 by the excited triplet state of the carbonyl derivative. Very persistent radicals, characterized by g-factors higher than 2.0040, are obtained when boron is compelled to lie in the molecular plane owing to chelation by an electron-rich
Late transition metal catalysts for olefin polymerization and oligomerization
申请人:Cherkasov Kuzunich Vladimir
公开号:US20060047094A1
公开(公告)日:2006-03-02
This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.
LATE TRANSITION METAL CATALYSTS FOR OLEFIN POLYMERIZATION AND OLIGOMERIZATION
申请人:ExxonMobil Chemical Patents Inc.
公开号:EP1521758A1
公开(公告)日:2005-04-13
US7247687B2
申请人:——
公开号:US7247687B2
公开(公告)日:2007-07-24
[EN] LATE TRANSITION METAL CATALYSTS FOR OLEFIN POLYMERIZATION AND OLIGOMERIZATION<br/>[FR] CATALYSEURS METALLIQUES A TRANSITION TARDIVE DESTINES A LA POLYMERISATION ET A L'OLIGOMERISATION D'OLEFINES
申请人:EXXONMOBIL CHEM PATENTS INC
公开号:WO2004007509A1
公开(公告)日:2004-01-22
This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.