Enantioselective Cyanosilylation of Aldehydes Catalyzed by Mn(salen) Complex/Triphenyl Phosphine Oxide.

ChemInform ◽  
2007 ◽  
Vol 38 (49) ◽  
Author(s):  
Sung Soo Kim ◽  
Ju Myung Kwak ◽  
Soney C. George
Keyword(s):  
Phosphine Oxide ◽  
Triphenyl Phosphine ◽  
Salen Complex ◽  
Triphenyl Phosphine Oxide

Organothallium compounds. VII. β-Diketonatobis(pentafluorophenyl)-thallium(III) compounds and their coordination derivatives

1971 ◽  
Vol 24 (12) ◽  
pp. 2519 ◽  
Author(s):  
GB Deacon ◽  
VN Garg
Keyword(s):  
Molecular Weight ◽  
Phosphine Oxide ◽  
Spectroscopic Data ◽  
Triphenyl Phosphine ◽  
Organothallium Compounds ◽  
Triphenyl Phosphine Oxide

The complexes (C6F5)2TlX [X = MeCOCHCOMe (acac), CF3COCHCOMe (tfac), CF8COCHCOCF3 (hfac), PhCOCHCOMe (bzac), PhCOCHCOPh (dbm), or quinolin-8- olate (oxinate or ox)], have been prepared by reactions between bromobis(pentafluorophenyl)thallium(III) and the appropriate sodium or thallous β-diketonates or sodium quinolin-8-olate, and react with equimolar amounts of 1,10-phenanthroline (phen) or 2,2?-bipyridyl (bipy) to give the complexes (C6F5)2- (phen or bipy)TlX (X = acac, tfac, or hfac), (C6F5)2(phen)TlX (X = bzac, dbm, or ox), but not (C6F5)2(bipy)TlX (X = bzac, dbm, or ox). On reaction with triphenyl- phosphine oxide or triphenylarsine oxide, the complexes (C6F5)2(Ph3PO or Ph3AsO)-TlX (X = acac, tfac, hfac, or dbm) and (C6F5)2Ph3AsOTl(ox) have been obtained. From conductance and molecular weight measurements and spectroscopic data, the complexes (C6F5)2TlX (except X = ox), (C6F5)2(Ph3PO or Ph3AsO)TlX, and (C6F5)2(phen or bipy)TlX, are considered to be monomeric with chelated β-diketonate or oxinate groups, and hence to contain four-, five-, and six-coordinate thallium respectively, whereas (C6F5)2Tl(ox) is considered to have an associated structure with bridging oxinate groups.

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