Correlation between phosphorus–tungsten coupling constants and carbonyl stretching frequencies in phosphorus-ligand derivatives of tungsten hexacarbonyl

Grim, Samuel O.; McAllister, Patrick R.; Singer, Roger M.

doi:10.1039/c2969000038b

Cited by 28 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“… Tungsten satellites ( J = 228 Hz for 5 and 227 Hz for 7 ) are also observed and are comparable to literature values. The 13 C NMR spectra of 5 and 6 each exhibit six different peaks for the cyclohexyl groups, indicating the diastereotopic effects observed in 3 (described above) are carried through to the metal analogues. The resonance due to carbon C1 is shifted 7 ppm farther downfield, a trend which has also been reported for M(CO) 4 (PCy 3 ) 2 compounds .…”

Section: Resultsmentioning

confidence: 91%

Synthesis and Structure of Molybdenum and Tungsten Bisphosphine Carbonyl Dimers

Brayton

Heinekey

2008

Organometallics

View full text Add to dashboard Cite

The synthesis of two bisphosphine ligands (R2P)2C6H4 with a para-disubstituted phenyl moiety is described (R = Cy (3), i-Pr (4)). Solutions of M(CO)3(C7H8) (C7H8 = η6-cycloheptatriene, M = Mo and W) and 3 or 4 were reacted under CO affording dimeric compounds of the general formula [M2(CO)8((R2P)2C6H4)2] (M = W, R = Cy (5); M = Mo, R = Cy (6); and M = W, R = i-Pr (7)). When the same reactions are carried out in the presence of H2, similar W−H2 analogues of the general formula [W2(CO)6((R2P)2C6H4)2(H2)2], R = Cy (8), R = i-Pr (9), can be observed by 1H and 31P NMR spectroscopy. Compounds 8 and 9 are not isolable, due to facile ligand redistribution forming 5 and 7, respectively.

show abstract

Section: Resultsmentioning

confidence: 91%

Synthesis and Structure of Molybdenum and Tungsten Bisphosphine Carbonyl Dimers

Brayton

Heinekey

2008

Organometallics

View full text Add to dashboard Cite

show abstract

“…3 eiithBlt die slP-Koordinationsversehiebungen der ;lIetallkomplexe. In der erst en Spalte sind die DifferenZen der 31P-Versehiebungen der PIv = PA-Atome in den Komplexen zu der P-Dreiring-Resonaiiz im freien Liganden (me,Si),P, 1 aufgefuhrt, also die ursprunglich so definierten Koordinationsverschiebuiigeii [19]. Die weiteren Spalten enthalteii die DifferenZen der PIrr = Pa,-Verschiebungen in den Xetallkomplexen zum 31P-1Vei-t des freien Liganden (P-Dreiringatome) sowie die Differeiizen der PII1 = P s -(Spitzen-Atome) zur 31P-Resonanz des oberen P-Atoms in 1.…”

Section: Strukturaufklarung Der Metallkomplexe Von 1 Mit Hilfe Der 31unclassified

Metallkomplexe des Hexamethyl‐trisila‐tetraphospha‐nortricyclen P₄ (Sime₂)₃

Fritz¹,

Uhlmann²

1980

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

Die Titelverbindung P4(Sime2)3 1 bildet mit Mo(CO)6, Cr(CO)5THF und Mn(η‐C5H5)(CO)2THF kristalline Komplexverbindungen, in denen 1 als einzähniger Ligand mit einem P‐Atom des P‐Dreiringes as das Metall Koordiniert ist. Mit Mn(η‐C5H5)(CO)2 THF lassen sich auch zwei Mn(η‐C5H5)(CO)2‐Gruppen an 1 koordinieren, Wobei die Bindung über je ein P‐Atom des P‐Dreiringes erfolgt. Mit Cr(CO)4‐Norbornadien reagiert 1 unter Dimerisierung zum (CO)4Cr[μ‐P 4(Sime3)3]2Cr(CO)4(rote Kristalle). Die beiden Moleküle von 1 sind ü ber je zwei P‐Atome ihres P‐Dreiringes durch zwei Cr(CO)4‐Gruppen zu einem Sechsring Verbunden.

show abstract

Comparative Study of Novel Phosphordiamidite and Phosphite Ligands Used in Alkene Hydroformylation; Synthesis, Characterization, Metalation, and Catalytic Evaluation

et al. 2018

View full text Add to dashboard Cite

Three novel ligands have been prepared by the reactions of 1,1′-(chlorophosphinediyl)bis(1H-pyrrole) with either 2pyridinemethanol or 2,6-pyridinedimethanol or the reaction of 1,1′-biphenyl-2,2′-diyl phosphorochloridite with 2-pyridinemethanol. Measurement of | 1 J P-Se | values demonstrate that the phosphite donor is less basic than the phosphoramidite donors. Coordination preferences of the ligands in octahedral cis-tetracarbonylmolybdenum(0) and square planar cis-dichloropalladium(II) complexes have been evaluated using multinuclear NMR and X-ray crystallography. Rhodium(I) complexes of the Scheme 2. Synthesis of chelating molybdenum complexes 1-3.Scheme 3. Synthesis of palladium chelating complexes 4, 5 and 6.

show abstract

Correlation between phosphorus–tungsten coupling constants and carbonyl stretching frequencies in phosphorus-ligand derivatives of tungsten hexacarbonyl

Cited by 28 publications

References 0 publications

Synthesis and Structure of Molybdenum and Tungsten Bisphosphine Carbonyl Dimers

Synthesis and Structure of Molybdenum and Tungsten Bisphosphine Carbonyl Dimers

Metallkomplexe des Hexamethyl‐trisila‐tetraphospha‐nortricyclen P₄ (Sime₂)₃

Comparative Study of Novel Phosphordiamidite and Phosphite Ligands Used in Alkene Hydroformylation; Synthesis, Characterization, Metalation, and Catalytic Evaluation

Contact Info

Product

Resources

About

Correlation between phosphorus–tungsten coupling constants and carbonyl stretching frequencies in phosphorus-ligand derivatives of tungsten hexacarbonyl

Cited by 28 publications

References 0 publications

Synthesis and Structure of Molybdenum and Tungsten Bisphosphine Carbonyl Dimers

Synthesis and Structure of Molybdenum and Tungsten Bisphosphine Carbonyl Dimers

Metallkomplexe des Hexamethyl‐trisila‐tetraphospha‐nortricyclen P4 (Sime2)3

Comparative Study of Novel Phosphordiamidite and Phosphite Ligands Used in Alkene Hydroformylation; Synthesis, Characterization, Metalation, and Catalytic Evaluation

Contact Info

Product

Resources

About

Metallkomplexe des Hexamethyl‐trisila‐tetraphospha‐nortricyclen P₄ (Sime₂)₃