Zobrazeno 1 - 10
of 152
pro vyhledávání: '"Peter P. Gaspar"'
Autor:
Eva M. Gulotty, Richard J. Staples, Shannon M. Biros, Peter P. Gaspar, Nigam P. Rath, William R. Winchester
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 74, Iss 8, Pp 1142-1146 (2018)
The synthesis and crystal structures of two tris(trialkylsilyl)silyl bromide compounds, C9H27BrSi4 (I, HypSiBr) and C27H63BrSi4 (II, TipSiBr), are described. Compound I was prepared in 85% yield by free-radical bromination of 1,1,1,3,3,3-hexamethyl-2
Externí odkaz:
https://doaj.org/article/9f0613eb93ce4567a904812f097e9d98
Autor:
Peter P. Gaspar, Nigam P. Rath, Richard J. Staples, Eva M. Gulotty, Shannon M. Biros, William R. Winchester
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications
Acta Crystallographica Section E: Crystallographic Communications, Vol 74, Iss 8, Pp 1142-1146 (2018)
Acta Crystallographica Section E: Crystallographic Communications, Vol 74, Iss 8, Pp 1142-1146 (2018)
The title compounds, I (HypSiBr), and II (TipSiBr), crystallized in the cubic space group Pa and the triclinic space group P , respectively. In both structures the central silicon atom is sterically hindered with bond angles that deviate from the exp
Autor:
Farnaz A. Shakib, Ponnadurai Ramasami, Peter P. Gaspar, Henry F. Schaefer, Mohammad R. Momeni, Ashwini Bundhun
Publikováno v:
RSC Advances. 6:53749-53759
A new series of unsaturated stannylenes is studied computationally. The singlet and triplet states of acyclic and cyclic stannylenes are fully optimized using the B3LYP, BHLYP, OPBE, and M06 functionals. The basis sets used are of double-ξ plus pola
Publikováno v:
Inorganic Chemistry. 51:12152-12164
A systematic investigation is carried out using the B3LYP, BLYP, and BHLYP functionals and MP2 level of theory to characterize the low-lying electronic singlet and triplet GeC2N2 isomers. The basis sets used are of double-ζ plus polarization quality
Publikováno v:
Inorganic Chemistry. 51:851-863
Systematic computational studies of stannylene derivatives SnX2/SnXY and XSnR/SnR2/RSnR′ were carried out using density functional theory. The basis sets used for H, F, Cl, Br, C, Si, and Ge atoms ...
Autor:
Amber L. Russell, Henry W. Rohrs, Daryl Giblin, David Read, Michael L. Gross, Peter P. Gaspar
Publikováno v:
International Journal of Mass Spectrometry. 287:8-15
A method for the study of reactions of open-shell neutrals (radicals) and radical cations is described. Pyrolysis (25-1500 degrees C) of thermally labile compounds, such as, 1,5-hexadiene via a Chen nozzle yields a seeded beam of reactive species in
Autor:
Mrinmoy Nag, Peter P. Gaspar
Publikováno v:
Organometallics. 28:5612-5622
B3LYP, MPW1K, and CCSD(T) electronic structure calculations were employed to investigate the mechanisms for the addition of singlet carbene analogues dimethylsilylene, Me2Si:, dimethylgermylene, Me2Ge:, and dimethylstannylene, Me2Sn:, to 1,3-butadien
Autor:
Mrinmoy Nag, Peter P. Gaspar
Publikováno v:
Chemistry – A European Journal. 15:8526-8532
Roark and Peddle first observed that, when not trapped, Me 2 Si= SiMe 2 underwent a series of rearrangements to give two major isomeric products: 1,1-dimethyl-1,3-disilacyclobutane and 1,3-dimethyl-1,3-disilacyclobutane. The widely accepted mechanism
Publikováno v:
Organometallics. 28:2595-2608
1,1-Diorgano-1-stannacyclopent-3-enes have been synthesized by condensation in THF of magnesium complexes of 1,3-dienes and dichlorodiorganostannanes. 1,1-Dimethyl-, 1,1-di-n-butyl-, 1,1-di-tert-butyl-, and 1,1-diphenyl-1-stannacyclopent-3-enes and 1
Autor:
Michael L. Gross, Henry W. Rohrs, David F. Read, Amber L. Russel, Peter P. Gaspar, Mrinmoy Nag, Dong Zhou
Publikováno v:
Silicon Chemistry. 3:117-122
Reinvestigation of the flow pyrolysis of 1,1,2,2-tetramethyl-1,2-disilacyclohex-4-ene did not identify conditions under which the retro-Diels Alder reaction was the exclusive process. Extrusion of Me2Si=SiMe2was confirmed, but dimerization of directl