Michael A. Weiner
City University of New York
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Journal of the American Chemical Society | 1961
Dietmar Seyferth; Michael A. Weiner
The transmetalation reaction occurring between phenyllithium and tetravinyltin (4: 1 molar ratio) in ether produces vinyllithium in good yield. A similar reaction occurs between n-butyllithium and tetravinyltin in pentane; in this case solid vinyllithium precipitates. Vinyllithium is more stable in ether and tetrahydrofuran solution than are nbutyllithium or phenyllithium. The use of vinyllithium in the preparation of a number of previously known vinyl compounds, as well as of the new STAB(CH = CH/sub 2/)/sub 4/!/sup -/ and STAB(CH ~ CH/sub 2/ ) (C/sub 6/H/sub 5/)/sub 3/!/sup -/ ions, is described. (auth)
Inorganica Chimica Acta | 1977
Michael A. Weiner; A. Gin; Michael Lattman
Abstract The ultraviolet photoelectron spectra of Cr(CO) 5 (4-RPyr) have been measured, and the IPs observed below 12 eV are discussed. Bands found in the region 7-8 eV are assigned to ionization from the chromium d orbitals. The IP values are shown to increase with the increasing electron acceptor nature of the ring substituents. The remaining bands below 12 eV are assigned to the pyridine orbitals. The IP values of the uncomplexed pyridines are observed to increase upon complexation, and a comparison is made of the effects of complexation with the Cr(CO) 5 and BH 3 moieties.
Journal of Organometallic Chemistry | 1972
Michael A. Weiner; Paul Schwartz
Abstract The results of p K a measurements on 4-substituted pyridine N -oxides show that organosilicon and organogermanium substituents are responsible for a decreased basicity relative to the tert-butyl derivative and the unsubstituted compound. No such effect is shown in the 3-substituted compounds. The results of hydrogen-bonding studies on the 4-substituted pyridine N -oxides (using methanol and phenol as acids) show that the organometallic substituents are responsible for a decreased basicity relative to the tert-butyl derivative, but not when compared to the unsubstituted compound. The effect of changing experimental conditions on the nature of the pyridine N -oxide moeity is discussed.
Journal of Organic Chemistry | 1961
Dietmar Seyferth; Michael A. Weiner
Journal of the American Chemical Society | 1961
C. S. Johnson; Michael A. Weiner; J. S. Waugh; Dietmar Seyferth
Journal of the American Chemical Society | 1962
Dietmar Seyferth; Michael A. Weiner
Journal of Organic Chemistry | 1959
Dietmar Seyferth; Michael A. Weiner
Journal of Organic Chemistry | 1975
Michael A. Weiner; Michael Lattman; Samuel O. Grim
Journal of the American Chemical Society | 1963
Michael A. Weiner; Robert West
Inorganic Chemistry | 1982
Amitabha. Basu; Michael A. Weiner; Thomas C. Strekas; Harry D. Gafney