Cyclopentadienyls tungsten

JOM(400)149 96BSCF33]. The complex 164 is the first known t] -phospholyl species. The tungsten atoms have a coordination number of 9, and the carbon atoms of the phospholyl ring are coplanar. The phosphorus atom deviates from the plane of carbon atoms by 0.015 nm. The basic difference between the Ti -cyclopentadienyl and ri -phospholyl complexes is the existence of a low-lying LUMO localized mainly at the phosphorus atom. [Pg.145]

The 772-phosphinocarbene complexes of tungsten show ambiphilic behavior. With Lewis acids such as MeS+, electrophilic attack occurs at the metal-carbon double bond affording the dicationic tunstaphosphathiabi-cyclo[1.1.0]butane complexes 102.96,97 On the other hand, nucleophiles such as trialkyl phosphines or the cyclopentadienyl anion C5H5 add at the carbe-nic center, affording phosphoranylidene complexes 10397 or tungstaphos-... [Pg.212]

Cyclopentadienyl-manganese, -molybdenum and -tungsten anions react with organic halides to give species with five independent ligands - (Scheme 16) ... [Pg.104]

Tris(aminomethyl)ethane, 2044 1,1, l-Tris(bromomethyl)methane, 1550 Tris(cyclopentadienyl)cerium, 3683 Tris(hydroxymethyl)methylamine, 1731 Tungsten hexamethoxide, 2604... [Pg.337]

Electrochemical recognition, 39 80 anions, macrocyclic and acyclic polycobalti-cinium ligand systems, 39 134-140 cations, 39 81-133 ammonium cation, 39 128-133 crown ether and bis crow ether ligands containing bipyridyl transition metal recognition sites, 39 111 crown ether dithiocarbamate and dithi-olene complexes, 39 123-124 di-h-cyclopentadienyl-molybdenum(IV) and -tungsten(IV) crown ether complexes, 39 107-108... [Pg.88]

CYCLOPENTADIENYL)NITROSYL chromium, MOLYBDENUM, AND TUNGSTEN COMPLEXES... [Pg.208]

Dicarbonyl(ti5-cyclopentadienyl)hydrido(triphenylphosphine) molybdenum and -tungsten... [Pg.98]

BF404WC,]Hm, Tungsten(l +), (acetone)-tricarbonyl(r 5-cyclopentadienyl)-tetrai1uoroborate(l -), 26 105 BF40,ReC5, Rhenium, pentacarbonyl-[tetrafluoroborato(l —)]-, 26 108 BF405ReC7H4, Rhenium(l+), pentacar-bonyl-(-r)2-ethene)-tetrafluoroborate( 1 —), 26 110 BO PtC Fl, Platinum(II), (3-methoxy-3-oxo-KO-propyl-KC )bis(triethyl-phosphine)-... [Pg.412]

CjHjS, Thiophene, tetrahydro-gold complexes, 26 85-87 C4H,NO, 2-Propenamide, 2-methyl-nickel complex, 26 205 C4H1()02, Ethane, 1,2-dimethoxy-solvates of chromium, molybdenum, and tungsten carbonyl cyclopentadienyl complexes, 6 343 tungsten complex, 26 50 ytterbium complex, 26 22 C4H i02.NaC5H5, Ethane, 1,2-dimethoxy-compd. with cyclopentadienylsodium, 26 341... [Pg.414]

OjBFjPWCvsHa, Tungsten, dicarbonyl(r s-cyclopentadienyl)[tetrafluoro-borato(l - )](triphenylphosphine)-, 26 98... [Pg.429]

BFjMoCsH, Molybdenum, tricarbonyl-(ti5-cycl°Pent3d>enyl)[tetrafluoro-borato-(l -)]-, 26 96 0,BFjMoCkiH, Molybdenum(I + )tricar-bonyl(Ty-cyclopentadienyl)(Ti -ethene)-tetrafluoroborate(l-), 26 102 OiBF4WC H5, Tungsten, tricarbonyl (-rf-cyclopentadienyl)[tetrafluoroborato-(1-)]-, 26 96... [Pg.430]

WBF404C H , Tungsten(l + ), (acetone)-triearbonyl(r) -cyclopentadienyl)-tetrafluoroborate(l-), 26 105... [Pg.443]

Cp2Mo2(CO)4] is an important member of a group of cyclopentadienyl compounds and, like its chromium and tungsten analogues, this species is considered to involve a metal-metal triple bond.7,220 These and related compounds manifest a rich and novel chemistry,221 but this falls outside the field of this review. [Pg.1316]

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