Diphenylphosphine

Bianco, V. D.; Doronzo, S.; Chan, J.; Bennett, Martin A.

doi:10.1002/9780470132470.ch43

Cited by 45 publications

(14 citation statements)

References 8 publications

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“…of occluded LiCl based on elemental analysis (Scheme ). The 1 H and 31 P NMR spectra of H 2 XP 2 revealed 1 J 1H,31P couplings of 225 Hz and 229 Hz for the P‐H signals of the two diastereomers, similar to those in Ph 2 PH (218 Hz), as well as related PCP‐, PNP‐, and POP‐donor pro‐ligands (211–227 Hz).…”

Section: Resultsmentioning

confidence: 66%

Potassium and Yttrium Complexes of a Rigid Bis‐Phosphido POP‐Donor Ligand

et al. 2017

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Dilithiation of 4,5-dibromo-2,7-di-tert-butyl-9,9-dimethyl-xanthene (XBr 2 ) followed by addition of 2 equiv. of (2,4,6-triisopropylphenyl)dichlorophosphine (TrippPCl 2 ) afforded 4,5-bis[(2,4,6-triisopropylphenyl)chlorophosphino]-2,7di-tert-butyl-9,9-dimethylxanthene (XP 2 Cl 2 ), which was reduced to 4,5-bis[(2,4,6-triisopropylphenyl)phosphino]-2,7-di-tert-butyl-9,9-dimethylxanthene (H 2 XP 2 ) using excess LiAlH 4 . Deprotonation of H 2 XP 2 with excess KH in DME provided the dipotassium salt, [K 2 (XP 2 )(dme) n ] (1; n = 2.5-4), and stirring 1 in THF followed [a]

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Section: Resultsmentioning

confidence: 66%

Potassium and Yttrium Complexes of a Rigid Bis‐Phosphido POP‐Donor Ligand

et al. 2017

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“…HPPh 2 was obtained by reductive cleavage of PPh 3 with Li powder in thf and subsequent hydrolysis and distillation, as described by Bianco and Doronzo. [92] Deprotonation of HPPh 2 with nBuLi yields LiPPh 2 ; [93] employing hexane leads to precipitation of solvent-free LiPPh 2 . Bromination of HSitBu 2 Me [94] according to the literature method [95] yields BrSitBu 2 Me.…”

Section: Methodsmentioning

confidence: 99%

Broadening the Scope of Ancillary Phosphane‐Type Ligands: A Systematic Comparison of PR₃, PR₂BH₃^–, and SiR₃^– and Their Chalcogen Derivatives

et al. 2007

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This work describes a systematic experimental and theoretical study of the properties of two series of isoelectronic and largely isosteric ligands, namely PPh2Me, PPh2BH3–, and SiPh2Me– and SPtBu3, SPtBu2BH3–, and SSitBu3–. In addition, we have also investigated the oxo derivatives OPPh2BH3– and OSiPh2Me–. Based on X‐ray crystal structure determinations (Fe–CO and C–O bond lengths) as well as NMR [e.g. δ(13CO)] and IR [ν(CO)] spectroscopic investigations of the corresponding [CpFe(CO)2]+ complexes, we can conclude that, with respect to electron donor strength, phosphanyl borohydrides occupy an intermediate position between phosphanes (weakest donors) and silyl ligands (strongest donors). The same is true for the thio derivatives, although the differences are smaller. In the reaction with [CpFe(CO)2]+, the oxo derivative OPPh2BH3– transfers a hydride ion rather than forming a stable [CpFe(CO)2(OPPh2BH3)] complex. The tendency to undergo hydride‐transfer reactions was studied by density functional calculations for the series PtBu2BH3–, OPtBu2BH3–, and SPtBu2BH3–. The results reveal that OPtBu2BH3– is the strongest and SPtBu2BH3– the weakest hydride donor, in accordance with the experimental observations. Theoretical analysis indicates that the three derivatives PPh2Me, PPh2BH3–, and SiPh2Me– are truly isolobal species despite variations in their charge distributions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

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“…HPPh 2 (2) was obtained through reductive cleavage of triphenylphosphane with lithium powder in THF and subsequent hydrolysis and distillation as described by Bianco and Doronzo. [35] Synthesis of K[PPh 2 ] (1): The compound was obtained through deprotonation of HPPh 2 (2; 320 mg, 1.72 mmol) with potassium metal (120 mg, 3.07 mmol) in THF (5 mL). The resulting orange solution was decanted from excess potassium and directly used for the NMR measurements.…”

Section: Methodsmentioning

confidence: 99%

Phosphanylborohydrides: First Assessment of the Relative Lewis Basicities of [BH₃PPh₂]^–, CH₃PPh₂, and HPPh₂

et al. 2006

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The compounds K[PPh2], HPPh2, CH3PPh2, BH3(H)PPh2, BBr3(H)PPh2, BH3(CH3)PPh2, BBr3(CH3)PPh2, [H2PPh2]I, [CH3(H)PPh2]I, [(CH3)2PPh2]I, and K[(BH3)2PPh2] have been investigated by NMR spectroscopy. In addition, X‐ray crystal structures have been determined for K(18‐crown‐6)[PPh2], BBr3(H)PPh2, BBr3(CH3)PPh2, [H2PPh2]I, [CH3(H)PPh2]I, [(CH3)2PPh2]I, and K(18‐crown‐6)[(BH3)2PPh2]. An evaluation of coupling constants (e.g. 1JPCi; Ci = ipso carbon atom of a phenyl ring) augmented by an inspection of key structural parameters (e.g. the angles Ci–P–Ci′) leads to the conclusion that dative bonds originating from ligand [BH3PPh2]– possess a significantly higher p character than dative bonds involving the ligands HPPh2 and CH3PPh2. The 1JPB values obtained for BH3(H)PPh2, BH3(CH3)PPh2, and [(BH3)2PPh2]– suggest [BH3PPh2]– to form the strongest [BH3] adduct of all three compounds which is in agreement with the results of displacement reactions employing the couples CH3PPh2/[(BH3)2PPh2]– and [BH3PPh2]–/BH3(CH3)PPh2. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

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Diphenylphosphine

Cited by 45 publications

References 8 publications

Potassium and Yttrium Complexes of a Rigid Bis‐Phosphido POP‐Donor Ligand

Potassium and Yttrium Complexes of a Rigid Bis‐Phosphido POP‐Donor Ligand

Broadening the Scope of Ancillary Phosphane‐Type Ligands: A Systematic Comparison of PR₃, PR₂BH₃^–, and SiR₃^– and Their Chalcogen Derivatives

Phosphanylborohydrides: First Assessment of the Relative Lewis Basicities of [BH₃PPh₂]^–, CH₃PPh₂, and HPPh₂

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Diphenylphosphine

Cited by 45 publications

References 8 publications

Potassium and Yttrium Complexes of a Rigid Bis‐Phosphido POP‐Donor Ligand

Potassium and Yttrium Complexes of a Rigid Bis‐Phosphido POP‐Donor Ligand

Broadening the Scope of Ancillary Phosphane‐Type Ligands: A Systematic Comparison of PR3, PR2BH3–, and SiR3– and Their Chalcogen Derivatives

Phosphanylborohydrides: First Assessment of the Relative Lewis Basicities of [BH3PPh2]–, CH3PPh2, and HPPh2

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Broadening the Scope of Ancillary Phosphane‐Type Ligands: A Systematic Comparison of PR₃, PR₂BH₃^–, and SiR₃^– and Their Chalcogen Derivatives

Phosphanylborohydrides: First Assessment of the Relative Lewis Basicities of [BH₃PPh₂]^–, CH₃PPh₂, and HPPh₂