Phosphorus-31 nuclear magnetic resonance study of tertiary phosphine derivatives of group VI metal carbonyls. III. Disubstituted compounds

Grim, Samuel O.; Wheatland, David A.

doi:10.1021/ic50078a030

Cited by 73 publications

(17 citation statements)

References 2 publications

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“…The 31 P-NMR spectrum of trans -W(CO) 4 (PCy 3 ) 2 exhibits one signal at 32.18 ppm, accompanied by the 183 W satellites (the 183 W Á/ 31 P coupling constant is 256 Hz, similar to the values observed for the trans -W(CO) 4 (PR 3 ) 2 complexes [21]. The larger 183 W Á/ 31 P coupling constant in trans -W(CO) 4 (PCy 3 ) 2 than that in W(CO) 5 (PCy 3 ) is consistent with the stronger (shorter) W Á/P bond in the former than that in the latter complex.…”

Section: Resultssupporting

confidence: 67%

Reaction of pentacarbonyl(η2-bis(trimethylsilyl)ethyne)tungsten(0) with tricyclohexylphosphine: X-ray structure of pentacarbonyltricyclohexylphosphinetungsten(0)

Demircan

Özkâr²,

Ülkü³

et al. 2003

Journal of Organometallic Chemistry

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Section: Resultssupporting

confidence: 67%

Reaction of pentacarbonyl(η2-bis(trimethylsilyl)ethyne)tungsten(0) with tricyclohexylphosphine: X-ray structure of pentacarbonyltricyclohexylphosphinetungsten(0)

Demircan

Özkâr²,

Ülkü³

et al. 2003

Journal of Organometallic Chemistry

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“…The 31P values for [($,P(Me,-pz)),M(CO),] (I, 11) are consistent with trends reported in the literature (41,42), in that the greater numerical value is found in the molybdenum complexes.…”

Section: N~lclear Magtzetic Resonance Spectrasupporting

confidence: 87%

“…The phosphorus coordination shifts (A31P) for various tl-ans-L,M(CO), complexes (41,42) are listed in Table 4, for comparison with our compounds I and 11. The 31P values for [($,P(Me,-pz)),M(CO),] (I, 11) are consistent with trends reported in the literature (41,42), in that the greater numerical value is found in the molybdenum complexes.…”

Section: N~lclear Magtzetic Resonance Spectramentioning

confidence: 99%

3,5-Dimethylpyrazolylphosphine molybdenum(0) and tungsten(0) carbonyl complexes

Davis¹,

Hoyano²,

Leung³

et al. 1980

Can. J. Chem.

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Complexes with the general formula [LnM(CO)m], where [Formula: see text] x = 0–2, n = 1 or 2, M = Mo(0) or W(0), m = 3 or 4, were prepared by thermal or photolytic methods by the reaction of the appropriate 3,5-dimethylpyrazolyl phosphine ligand with M(CO)6, norbornadienemetaltetracarbonyl [C7H8M(CO)4], cycloheptatrienylmetaltricarbonyl [C7H8M(CO)3], [(Me2N(CH2)3NMe2)M(CO)4], [(CH3CN)2M(CO)4], or [(CH3CN)3M(CO)3]. Structural evidence indicates octahedral geometry about the metal atom centre, and several modes of coordination for the ligands in those complexes isolated and characterized. For x = 2, the ligand [Formula: see text] was monodentate, via phosphorus in [Formula: see text] and bidentate in [Formula: see text] where coordination by P and the 2N site of the pyrazolyl ring yielded four-membered [Formula: see text] metallocycles. For x = 1, the [Formula: see text] ligand was bidentate, via the phosphorus atom and one of the 2N sites of one of the pyrazolyl substituents, thus giving the four-membered [Formula: see text] metallocycle in [Formula: see text] and tridentate in [Formula: see text] where three facial CO's, two 2N atoms of the pyrazolyl rings, and a part of the phenyl ring occupy the six coordination sites. For x = 0, the P(Me2pz)3 ligand was tridentate via the 2N atoms of all three pyrazolyl rings, thus giving tricyclic systems [P(Me2pz)3M(CO)3] (VIII, IX).

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“…For complex 3 , satellites due to coupling to 183 W ( I = 1/2; natural abundance: 14.31%) are observed for the doublet. The 1 J PW coupling constant is 236 Hz, also suggesting a cis coordination of the ligand to the W(CO) 4 fragment . For local C 2 v symmetry, four absorptions would be expected in the infrared spectra of complexes 2 and 3 ; only three intense ν(CO) bands in the region of 1860–2013 cm –1 are observed indicating some overlap of absorptions …”

Section: Resultsmentioning

confidence: 96%

Versatile Coordination Modes of Triphospha-1,4-pentadiene-2,4-diamine

et al. 2018

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1,3,5-Triphospha-1,4-pentadiene-2,4-diamine reacts with [M(CO)L] (M = Mo, L = nbd (norbornadiene); M = W, L = 2 CHCN) to give the chelate complexes [M(CO)(PMes{C(NHCy)PMes}-κ P ,P)]. In contrast, an unusual intramolecular rearrangement occurred with [Cu(CHCN)]PF leading to the dimeric copper(I) complex [Cu(CNCy){PHMesPMesC(NHCy)PMes-κ P ,P}](PF). The mechanism of the rearrangement was supported by quantum-mechanical calculations. The transition-metal complexes were characterized by multinuclear NMR spectroscopy, mass spectrometry, infrared spectroscopy, and X-ray crystallography.

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Phosphorus-31 nuclear magnetic resonance study of tertiary phosphine derivatives of group VI metal carbonyls. III. Disubstituted compounds

Cited by 73 publications

References 2 publications

Reaction of pentacarbonyl(η2-bis(trimethylsilyl)ethyne)tungsten(0) with tricyclohexylphosphine: X-ray structure of pentacarbonyltricyclohexylphosphinetungsten(0)

Reaction of pentacarbonyl(η2-bis(trimethylsilyl)ethyne)tungsten(0) with tricyclohexylphosphine: X-ray structure of pentacarbonyltricyclohexylphosphinetungsten(0)

3,5-Dimethylpyrazolylphosphine molybdenum(0) and tungsten(0) carbonyl complexes

Versatile Coordination Modes of Triphospha-1,4-pentadiene-2,4-diamine

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