Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Joseph W. Bruno"'
Publikováno v:
Journal of the American Chemical Society. 126:2738-2743
The thermodynamic hydride donor abilities of 1-benzyl-1,4-dihydronicotinamide (BzNADH, 59 ± 2 kcal/mol), C5H5Mo(PMe3)(CO)2H (55 ± 3 kcal/mol), and C5Me5Mo(PMe3)(CO)2H (58 ± 2 kcal/mol) have been measured in acetonitrile by calorimetric and/or equi
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 177:479-485
Sterically congested bisphosphites were shown to be effective ligands for the Rh-catalyzed hydrosilation of ketones with diphenylsilane. The hydrosilation of 4-alkylcyclohexanones and ( m )-menthone led to a significant proportion of the less stable
Publikováno v:
Journal of Non-Crystalline Solids. 296:1-9
Organic aerogels are prepared by the acid catalyzed cross-linking of phenolic–furfural (PF) precursors in methanol solution, and the solvent is subsequently removed at high temperature as the supercritical fluid. The resulting aerogel is a brown op
Publikováno v:
Organometallics. 20:5547-5556
The chelating trisphenol ligands tris(2-hydroxyphenyl)amine (1H3) and tris(2-hydroxy-4,6-dimethylbenzyl)amine (2H3) proved to be excellent precursors for the chelating phenoxides, and the latter has been used to prepare a series of cyclopentadienylme
Autor:
Niladri Sarker and, Joseph W. Bruno
Publikováno v:
Organometallics. 20:55-61
Reported herein are the first thermodynamic hydricities (ΔGM+) for a collection of niobocene and tantalocene compounds (1−13) of general formulas (C5R4R‘)2M(H)(L) (R = H, Me; R‘ = H, Me, SiMe3; L = CO, PEt3, (H)2, PhCCPh, CH2O, O) and (C5H4SiM
Autor:
Azzam S. Hneihen, a Joseph W. Bruno, a Niladri Sarker, b and Gayle K. Schulte, a Margaret E. Kerr
Publikováno v:
Organometallics. 19:901-912
The niobium ketene complexes Cp‘2Nb(Cl)(OCC(R‘)CH2R) (1; Cp‘ = η5-C5H4SiMe3) exhibit complexation of the ketene CO bond. Upon treatment with an appropriate triarylcarbenium tetrafluoroborate they donate a hydride, a process constituting a usef
Autor:
Joseph W. Bruno, Niladri Sarker
Publikováno v:
Journal of the American Chemical Society. 121:2174-2180
The free energies for hydride donation (ΔGM+) have been determined in acetonitrile solution for a series of seven molybdenum and tungsten compounds (1−7) of general formula (C5R5)M(CO)2(L)H, which yield the salts [(C5R5)M(CO)2(L)(NCMe)][BF4] in th
Publikováno v:
The Journal of Organic Chemistry. 63:4671-4678
Gibbs free energies for scission of C−H bonds leading to carbanion and proton (mode a), radical pair (mode b), and carbenium ion and hydride (mode c) have been determined for a series of acidic C−H bonds in ca. 45 weak acids. This involved the us
Publikováno v:
Organometallics. 16:5884-5892
The niobium−mercury compounds [Cp‘2Nb(L)]2Hg (Cp‘ = η5-C5H4SiMe3, L = CO (4), PMe3 (5), or CNtBu (6)) serve as stable precursors to the short-lived Nb(II) radicals of general formula [Cp‘2Nb−L]. The homolysis of the Nb−Hg bond may result
Publikováno v:
Organometallics. 16:1331-1334
The niobocene formaldehyde complex Cp‘2Nb(Cl)(η2-CH2O) (1, Cp‘ = η5-C5H4SiMe3) reacts with [Ph3C][BF4] to give an alkoxide (2) of formula [Cp‘2Nb(Cl)(OCH2CPh3)][BF4] and with HBF4·OEt2 to give analogue 4 ([Cp‘2Nb(Cl)(OMe)][BF4]); these pro