Constrained-Geometry Bisphosphazides Derived from 1,8-Diazidonaphthalene: Synthesis, Spectroscopic Characteristics, Structural Features, and Theoretical Investigations
作者:Julius F. Kögel、Nuri C. Abacılar、Felicia Weber、Benjamin Oelkers、Klaus Harms、Borislav Kovačević、Jörg Sundermeyer
DOI:10.1002/chem.201304498
日期:2014.5.12
Attempts to protonate the obtained bisphosphazides and to prove the computationally predicted pKBH+ values through NMR titration reactions resulted in their decay, which again was rationalized by theoretical calculations. Altogether we present the so far most extensive spectroscopic, structural and theoretical investigation of constrained geometry bisphosphazides and their Brønsted and Lewis basic properties
Tris(dimethylamino)phosphane as a New Ligand in Gold(I) Chemistry: Synthesis and Crystal Structures of [(Me
<sub>2</sub>
N)
<sub>3</sub>
P]AuCl, {[(Me
<sub>2</sub>
N)
<sub>3</sub>
PAu]
<sub>3</sub>
O}+BF
<sub>4</sub>
<sup>−</sup>
, {[Me
<sub>2</sub>
N)
<sub>3</sub>
PAu]
<sub>3</sub>
NP(NMe
<sub>2</sub>
)
<sub>3</sub>
<sup>2</sup>
+ {BF
<sup>−</sup>
<sub>4</sub>
}
<sub>2</sub>
and the Precursor Molecule (Me
<sub>2</sub>
N)
<sub>3</sub>
PNSiMe
<sub>3</sub>
作者:Andreas Bauer、Norbert W. Mitzel、Annette Schier、Hubert Schmidbaur、David W. H. Rankin
DOI:10.1002/cber.19971300304
日期:1997.3
[Tris(dimethylamino)phosphane]gold(I) chloride, μ-tris-[tris(dimethylamino)phosphane]gold(I)}oxonium tetrafluoroborate, μ3-tris(dimethylamino)phosphaneimidotris[tris(dimethylamino)phosphane]gold(I)}(2+) bis(tetrafluoroborate) and N-trimethylsilyltris(dimethylamino)phosphaneimine were prepared using modifications of established procedures. Their structures were determined in single-crystal X-ray diffraction
Chlorophospheniums, precurseurs de nouveaux cations du phosphore dicoordonne
作者:M.R. Mazieres、C. Roques、M. Sanchez、J.P. Majoral、R. Wolf
DOI:10.1016/s0040-4020(01)86792-2
日期:1987.1
chlorophosphines ; it reacts with (R2N)2PCl leading to the corresponding phospheniumcation with the triflate anion CF3SO3- , as counter ion, but not with iPr2NPCl2. Nevertheless the mixture iPr2NPCl2 Me3SiOSO2CF3 generates the chlorophosphenium cation in presence of Me3SiX giving rise to iPr2N-P+ -X CF3SO3 in a one pot reaction. Surprisingly, the chlorophosphenium (Me2N)3PN-P+ -Cl undergoes a charge
Weiss constant of Θ = –694 K. Phosphaniminato-Komplexevon Mangan undCobaltmitHeterocubanstrukturDiePhosphaniminato-Komplexe [MnBr(NPEt3)]4 (1) und [M4Br5NP(NMe2)3}3] mit M = Mn (2) und M = Co (3) werden durch Schmelzreaktionen aus den wasserfreien Metalldibromiden mit den silylierten Phosphaniminen Me3SiNPR3 (R = Et, NMe2) in Gegenwart von Kaliumfluorid hergestellt und durch Kristallstrukturanalysen
Use of Computational and Synthetic Chemistry in Catalyst Design: A New Family of High-Activity Ethylene Polymerization Catalysts Based on Titanium Tris(amino)phosphinimide Complexes
作者:Chad Beddie、Emily Hollink、Pingrong Wei、James Gauld、Douglas W. Stephan
DOI:10.1021/om049545i
日期:2004.10.1
DFT calculations of the mechanism of polymerization for the series of catalyst models derived from CpTiMe2(NPR3) (R = Me, NH2, H, Cl, F) demonstrate the critical role of ion pairing in determining the overall barrier to polymerization and suggest that electron-donating substituents reduce this barrier. Based on these results, a family of precatalysts of general formula Cp‘TiX2(NP(NR2)3) (X = Cl, Me)