220169-11-9

Upstream product

• 1109-15-5 tris(pentafluorophenyl)borate 
• 594-09-2 trimethylphosphane 
• 249617-37-6 (η(5)-cyclopentadienyl)((cyclopentadienyl)tris(pentafluorophenyl)borato-κ(5)-C)trihydridotungsten 
• 259261-57-9 (C₅H₅BCH₃)Cr(CH₃)2(P(CH₃)3) 
• 623938-45-4 [2-((1-ethylpropylidene)amino)benzoato-κ(2)N,O](η1-benzyl)(trimethylphosphine)nickel(II) 
• 623938-44-3 [2-(cyclohexylideneamino)benzoato-κ(2)N,O](η1-benzyl)(trimethylphosphine)nickel(II) 
• 697289-02-4 [Ph2PC6H4C(O)NPh-κ2-P,N]Ni(η1-CH2C6H5)(PMe3)*benzene 
• 849774-73-8 [Ni(η1-benzyl)(trimethylphosphine)(C(CCH3O)(CCH3OB(C6F5)3)C(CH3)N(C6H3(CH(CH3)2)2))]*C6D6 

Relevant academic research and scientific papers

Reactions of phosphines with electron deficient boranes

A series of classical B(C6F5)3-phosphine adducts are shown to be reactive molecules. Reaction of (THF)B(C 6F5)3 with phosphines are shown to effect ring-opening of THF affording the zwitter

Thermal rearrangement of phosphine -B(C6F5) 3 adducts

A series of tertiary and secondary phosphine-B(C6F 5)3 adducts are shown to undergo facile, thermal-induced rearrangement to give zwitterionic species of the form R3P(C 6F4)BF(C6

Facile heterolytic cleavage of dihydrogen by phosphines and boranes

The facile heterolytic cleavage of H2 is readily achieved at room temperature by the cooperative action of the Lewis acidic borane and Lewis basic phosphine, where the steric congestion precludes quenching of the acid and base via adduct formation. Copyright

Remote activation of nickel catalysts for ethylene oligomerization

Remote control: A novel molecular design is described and used to probe the activation of transition-metal-based ethylene polymerization and oligomerization initiators by the action of a Lewis acid across an electronically delocalized structural unit. Com

Synthesis, characterization and ethylene reactivity of 2- diphenylphosphanylbenzamido nickel complexes

Addition of primary amines to N-[2-(diphenylphosphanyl)benzoyloxy] succinimide affords 2-diphenylphosphanylbenzamides, Ph2PC 6H4C(O)NHR (R = C(CH3)3, 3; R = H, 4; R = CH2CH2CH3, 5; R = CH(CH 3)2, 6). Addition of NiCl(η3-CH 2C6H5)(PMe3) to the deprotonated potassium salts of the amides and subsequent treatment of two equivalents of B(C6F5)3 to the resulting products furnishes η3-benzyl zwitterionic nickel(II) complexes, [Ph 2PC6H4C(O)NR-κ2N,P] Ni(η3-CH2C6H5) (R = C 6H5, 9; R = C(CH3)3,10; R = H, 11; R = CH2CH2CH3, 12; R = CH(CH3) 2, 13). Solid structures of 9, 11, 13 and the intermediate η1-benzyl nickel(II) complexes, [Ph2PC 6H4C(O)NR-κ2N,P]Ni(η1- CH2C6H5)(PMe3) (R = C 6H5, 7; R = C(CH3)3, 8) were determined by X-ray crystallography. When ethylene is added to the η3-benzyl zwitterionic nickel(II) complexes, butene is obtained by the complexes 9-12 but complex 13 provides very high molecular-weight branched polyethylene (Mw, ～1300000) with excellent activity (up to 5200 kg mol-1 h-1 at 100 psi gauge).

[2-(Alkylideneamino)benzoato]nickel(II) complexes: Active catalysts for ethylene polymerization

The complexes [RR′C=NC6H4C(O)O-κ2N,O] Ni(η3-CH2CMeCH2) (R, R′ = -(CH2)5-, 6; R = Et, R′ = Et, 7; R = tBu, R′ = H, 8) are prepared by reaction of the corresponding potassium salts with [(η3-CH2CMeCH2)NiCl]2 in CH3CN. Additions of 1 equiv of B(C6F5)3 afford the zwitterionic complexes [RR′C=NC6H4C{OB(C6 F5)3}O-κ2N,O]Ni (η3-CH2CMeCH2) (R, R′ = -(CH2)5-, 9; R = Et, R′ = Et, 10; R = tBu, R′ = H, 11), which give poly(ethylene) when ethylene gas is added. This result is interesting in that the corresponding 2-(diphenylphosphino)benzoato and 2-(diphenylamino)benzoato complexes give mainly butene. Reactions of the potassium salts with Ni(η3-CH2C6H5) Cl(PMe3) afford benzyl complexes, [RR′C=NC6H4C-(O)O-κ2N,O] Ni(η1-CH2C6H5)(PMe3) (R,R′ = -(CH2)5-, 12; R = Et, R′ = Et, 13). Additions of 2 equiv of B(C6F5)3 to 12 and 13 afford the zwitterionic η3-benzyl complexes [RR′C=NC6H4C-{OB(C6 F5)3}O-κ2N,O]Ni (η3-CH2C6H5) (R, R′ = -(CH2)5-, 14; R = Et, R′ = Et, 15). Complex 14 is rather unstable, and a bis ligand complex, [(CH2)5C=NC6H4C{OB(C6 F5)3}O-κ2N,O]2Ni (16), is formed during recrystallization. Complexes 14 and 15 are highly active to ethylene polymerization, and activities reach 3000-4000 kg/((mol of Ni) h) at 75 psig pressure. Solid structures of 6, 9, 11, 15, and 16 were determined by X-ray crystallography.

Electrophilic addition reactions of the Lewis acids B(C6F5)2R [R = C6F5, Ph, H or Cl] with the metallocene hydrides [M(η-C5H5)2H2] (M = Mo or W), [Re(η-C5H5)2H2] and [Ta(η-C5H5)H3]

The syntheses of the new compounds [η-C5H5)2H2], where R = (C6F5) 1, Ph 2, H 3 or Cl 4, [Mo(η-C5H5)2H2] 5, [Mo(n-C5H5)2(H)(n'-H2B(C6F5)2)] 6, [Mo(η-C5H5)2H2)] 7, [Re(η-C5H5)2H2]-0.5C 6H5Me 8, [Ta(η-C5H5)2H2] 9 and [Re(n-C5H5)(r,-C5H4-{B(C 6F5)2})(C6F5)] 10 are described. The crystal structures of compounds 4 and 10 have been determined. Initial electrophilic addition of the Lewis acid B(C6F5)3 occurs either by evo-addition to a carbon of a rj-cyclopentadienyl ring with formation of an cvo-{(C6F5)1B}C3Hj, or by formation of an M-u-H-B two-electron three-centre bond. The Royal Society of Chemistry 2000.