[EN] SUPPORTED OXIDE NH3-SCR CATALYSTS WITH DUAL SITE SURFACE SPECIES AND SYNTHESIS PROCESSES [FR] CATALYSEURS NH3-SCR À OXYDE SUPPORTÉ PRÉSENTANT DES ESPÈCES DE SURFACE À DOUBLE SITE, ET PROCESSUS DE SYNTHÈSE
[EN] SUPPORTED OXIDE NH3-SCR CATALYSTS WITH DUAL SITE SURFACE SPECIES AND SYNTHESIS PROCESSES [FR] CATALYSEURS NH3-SCR À OXYDE SUPPORTÉ PRÉSENTANT DES ESPÈCES DE SURFACE À DOUBLE SITE, ET PROCESSUS DE SYNTHÈSE
Contrasting
<i>cyclo</i>
‐P
<sub>3</sub>
Ligand Transfer Reactivity of Valence‐Isoelectronic Aryloxide Complexes [(P
<sub>3</sub>
)Nb(ODipp)
<sub>3</sub>
]
<sup>–</sup>
and [(P
<sub>3</sub>
)W(ODipp)
<sub>3</sub>
]
作者:Jens M. Breunig、Daniel Tofan、Christopher C. Cummins
DOI:10.1002/ejic.201301140
日期:2014.4
mer-Cl3W(ODipp)3 with Na/Hg in the presence of P4 in toluene afforded the orange complex (η3-P3)W(ODipp)3 (δ = –156 ppm, 10 % isolated yield). Unlike the valence-isoelectronic anion [(η3-P3)Nb(ODipp)3]–, treatment with AsCl3 of the neutral (η3-P3)W(ODipp)3 did not transfer the cyclo-P3 ligand to generate AsP3. Instead, this complex underwent aryloxideligandtransfer to form the red complex (η3-P3)W(Cl)(ODipp)2(THF)
作者:Quignard, Francoise、Leconte, Michel、Basset, Jean-Marie、Hsu, Leh-Yeh、Alexander, John J.、Shore, Sheldon G.
DOI:——
日期:——
Facile Synthesis of a Tungsten Alkylidyne Catalyst for Alkyne Metathesis
作者:Zachary J. Tonzetich、Yan Choi Lam、Peter Müller、Richard R. Schrock
DOI:10.1021/om0610647
日期:2007.1.1
Reaction of WCl3(OAr)(3) (Ar = 2,6-i-Pr2C6H3) with 4 equiv of t-BuCH2MgCl in diethyl ether produces yellow crystalline W(C-t-Bu)(CH2-t-Bu)(OAr)(2) in 40-50% isolated yield. W(C-t-Bu)(CH2-t-Bu)(OAr)(2) is a versatile entry for preparing W(C-t-Bu)(CH2-t-Bu)(NPh2)(2) and subsequently other W(C-t-Bu)(CH2-t-Bu)(OR)(2) species in situ, which are active alkyne metathesis catalysts.