716-85-8Relevant academic research and scientific papers
Catalyst composition and process for di-, tri- and/or tetramerization of ethylene
-
Page/Page column 7, (2014/02/16)
The present invention relates to a catalyst composition and a process for di-, tri- and/or tetramerization of ethylene, wherein the catalyst composition comprises a chromium compound, a ligand of the general structure (A) R1R2P—N(Rs
METHOD FOR PURIFYING A CRUDE PNPNH COMPOUND
-
Paragraph 0044, (2014/08/19)
The present invention relates to a method for purifying a crude PNPNH compound by metalation and re-protonation.
METHOD FOR PURIFYING A CRUDE PNPNH COMPOUND
-
Paragraph 0046, (2014/08/19)
A method for purifying a crude PNPNH compound of the general structure [in-line-formulae]R1R2P—N(R3)—P(R4)—N(R5)—H[/in-line-formulae] wherein R1, R2, R3, R4 /sub
METALATED LIGAND, CATALYST COMPOSITION, AND USE THEREOF IN THE OLIGOMERIZATION OF ETHYLENE
-
Paragraph 0064, (2014/08/19)
A process for oligomerization of ethylene, comprising subjecting a catalyst composition to a gas phase of ethylene and conducting an oligomerization, wherein the catalyst composition comprises (a) a chromium compound, (b) a metalated ligand, and (c) an ac
Synthesis of differently substituted N- and P-aminodiphosphinoamine PNPN-H ligands
Gongoll, Marc,Mueller, Bernd H.,Peitz, Stephan,Aluri, Bhaskar R.,Peulecke, Normen,Spannenberg, Anke,Rosenthal, Uwe,Al-Hazmi, Mohammed H.,Woehl, Anina,Mueller, Wolfgang
, p. 1845 - 1854 (2013/11/06)
On the basis of the known aminodiphosphinoamine ligand Ph 2PN(i-Pr)P(Ph) N(i-Pr)-H (3a), differently substituted aminodiphosphinoamine PNPN-H ligands (3) were prepared. By using different synthetic methods, the N-substituted ligands Ph2/s
Synthesis and reactions of the homoleptic chromium(II) bis-amide [Ph 2PN(iPr)P(Ph)N(iPr)-]2Cr with relevance to a selective catalytic ethene trimerization system to 1-hexene
Mueller, Bernd H.,Peulecke, Normen,Spannenberg, Anke,Rosenthal, Uwe,Al-Hazmi, Mohammed H.,Schmidt, Roland,Woehl, Anina,Mueller, Wolfgang
scheme or table, p. 3695 - 3699 (2012/06/30)
New organometallic compounds were obtained on the basis of the aminodiphosphinoamine ligand Ph2PN(iPr)P(Ph)N( iPr)-H (1), which is relevant for the selective ethene trimerization system consisting of ligand 1, CrCl3/
N, N′-bis(diphenylphosphino)diaminophenylphosphine ligands for chromium-catalyzed selective ethylene oligomerization reactions
Dulai, Arminderjit,McMullin, Claire L.,Tenza, Kenny,Wass, Duncan F.
experimental part, p. 935 - 941 (2011/05/03)
Reaction of 1 or 2 equiv of Ph2PCl with PhP(N(H)R)2 (R = n-propyl) yields Ph2PN(R)P(Ph)N(R)H (1) or Ph 2PN(R)P(Ph)N(R)PPh2 (2), respectively. In contrast, reaction of 1 or 2 equiv of Ph2PCl with PhP(N(H)R)2 (R = isopropyl) yields exclusively Ph2PN(R)P(Ph)N(R)H (3), even under more forcing conditions. Low-temperature NMR spectroscopy and a conformational analysis of Ph2PN(iPr)P(Ph)N(iPr)H (3) reveal the lowest energy conformer to have a close N-H???P interaction of 2.95 A, which we speculate may hinder further reactivity of this molecule. Reaction of 3 with [Cr(CO)6] yields [Cr(3)(CO)4] (5), which has been structurally characterized. Coordination of ligand 3 facilitates its conversion to Ph2PN(iPr)P(Ph)N(iPr)PPh2 (4) while bound to chromium, yielding the complex [Cr(4)(CO)4] (6), which has also been structurally characterized. Ligands 1 and 2, when reacted in situ with [Cr(acac)3] (acac = acetylacetonate) and modified methylalumoxane, and complexes 5 and 6, when activated with Ag[Al(OC4F 9)4] and triethylaluminum, are moderately active and selective catalysts for the selective oligomerization of ethene to 1-hexene and 1-octene.
(N-lithioamino)diorganophosphanes and bis(N- lithioamino)organophosphanes: Synthesis and structures
Eichhorn, Bettina,Noeth, Heinrich,Seifert, Thomas
, p. 2355 - 2368 (2007/10/03)
Butyllithium (nBuLi) deprotonates Ph2P-NHtBu in ether to give (Ph2P- NLitBu)2 · OEt2. There is no Li ··· P interaction in this molecule. Three compounds of the type R'P(NLiR)2 have been obtained by li
LES PHOSPHORANES MONOCYCLIQUES A LIAISON PH DANS LES REACTIONS DE REDISTRIBUTION DE LIGANDS DES COMPOSES DU PHOSPHORE TRICOORDONNE
Tangour, B.,Malavaud, C.,Boisdon, M. T.,Barrans, J.
, p. 189 - 196 (2007/10/02)
The oxidative addition of alcohols and amines with 2-alkyl, 2-aryl, 1,3,2-dioxa, oxaza or diazaphospholanes, leads to a ring opening reaction and ligands exchange around the phosphorus atom by alcoholysis or aminolysis of P-O or P-N bonds.In nearly all cases, monocyclic phosphoranes with P-H bond have been detected in an intermediate step during the exchange of one tricoordinate form to another one.At last we have discussed the phorpholanyl ring stability. - Key words: 1,3,2-Dioxaphospholanes; 1,3,2-oxaza-phospholanes; 1,3,2-diazaphospholanes; Monocyclic phosphoranes with P-M bonds; phosphoranyl ring stability.
