Preparation and characterization of di(tertiary phosphines) with electronegative substituents. 2. Unsymmetrical derivatives

Hill, W. E.; SILVA-TRIVINO, L. M.

doi:10.1021/ic50192a031

Cited by 50 publications

(21 citation statements)

References 6 publications

(6 reference statements)

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“…Further examples of P À P nonbonding interactions can be found in previously reported NMR spectra. [13][14][15][16] One might expect that the coupling may result of a repulsive interaction from the lone pairs of electrons at phosphorus. However, we found a P'C'C bond angles of 114.1 and 116.38 in the solid-state structure indicating an attractive interaction instead of a repulsive one, because this angle is smaller compared to the unsubstituted compound.…”

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confidence: 99%

Pnicogen Bonds: A New Molecular Linker?

Zahn

Frank

Hey-Hawkins

et al. 2011

Chemistry A European J

406

302

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C3 wechselt die Seite: Die Thermolyse eines Trirutheniumkomplexes mit einem μ3‐Pentylidin‐ und einem μ3‐Pentin‐Liganden zu beiden Seiten der von den Metallatomen gebildeten Ebene führt ausschließlich zu einem μ3‐Ethylidin‐μ3‐octin‐Komplex. Bei dieser Reaktion wandert ein C3‐Fragment von einer Seite der Ru3‐Ebene auf die andere, was in einer Umverteilung von zwei C5‐ in ein C2‐ und ein C8‐Molekül resultiert.

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confidence: 99%

Pnicogen Bonds: A New Molecular Linker?

Zahn

Frank

Hey-Hawkins

et al. 2011

Chemistry A European J

406

302

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“…[18] This trend was also observed for the previously published sulfur derivatives of I1 and I2, although in those cases, the downfield shift was more pronounced. [18] Also interesting is that the values found for the diphenylphosphine groups (-PPh 2 ) are very much shifted upfield with respect to the value found for 1-diphenylphosphino-carborane (δ = 25.2 ppm), [29] due to the presence of the iminophosphorane group on the other cage carbon atom. The value found for the phosphine oxide group in IP2, 18.7 ppm, is only slightly lower than the values found in the 31 P NMR spectra of other carboranyl-diphenylphosphine oxide derivatives described in the literature, such as 1,2-(OPPh 2 ) 2 -closo-C 2 B 10 H 10 (δ = 23.67 ppm) [28,30] or 1-OPPh 2 -2-R-closo-C 2 B 10 H 10 [R = Me (δ = 19.28 ppm), Ph (δ =19.65 ppm)].…”

Section: Synthesis and Characterization Of The Carborane Ligandsmentioning

confidence: 87%

Coordinating Ability of the Iminophosphorane Group in ortho‐Carborane Derivatives

2017

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Abstract:The coordinating ability of the nitrogen donor atom of C-carboranyl iminophosphoranes was studied in different ligand systems. The analysis of organotin derivatives of the unsubstituted iminophosphorane I1 (SnMe 3 I1 and SnClMe 2 I1) and the comparison with the non-carboranyl analog (SnClMe 2 I3), reveals the reduced donor capacity of the nitrogen atom due to the closo-carborane group. To promote the coordination of this weak donor atom, new phosphine-iminophosphorane ligands (IP1 and IP2), with an extra -PPh 2 group on the other cage carbon atom, were synthesized and structurally characterized. The analysis of the products formed by the reaction of these ligands with the metal precursor cis-

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“…The mono-substituted o-carborane derivatives have been synthesized in aromatic solvent, but the conversion was too low for further development of this kind of compounds, since the synthesis of mono-substituted ortho-caborane species is synthetically more difficult [42,43]. The preparation of them was improved by C. Vinãs and co-authors utilizing DME as solvent and the mono-substituted o-carborane derivatives such as 1-SH-1, 2-C 2 B 10 H 11 and 1-PPh 2 -1,2-C 2 B 10 H 11 can be obtained in high yields [44].…”

Section: Synthesis Of Ligand Licarb Smentioning

confidence: 99%