Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 13991-08-7, C30H24P2. A document type is Article, introducing its new discovery., Quality Control of: 1,2-Bis(diphenylphosphino)benzene
The reactions of the soft diphosphines o-C6H 4(PMe2)2, Me2P(CH2) 2PMe2, Et2P(CH2)2PEt 2 or o-C6H4(PPh2)2 with NbF5 or TaF5 in anhydrous MeCN solution produce [MF 4(diphosphine)2][MF6] (M = Nb or Ta), which have been characterised by microanalysis, IR, 1H, 19F{1H}, 31P{1H} and 93Nb NMR spectroscopy. X-ray crystal structures are reported for the isomorphous [MF4{o-C6H4(PMe2)2} 2][MF6], which confirm the presence of eight-coordinate (distorted dodecahedral) cations. The corresponding reactions using o-C 6H4(AsMe2)2 produced [MF 4{o-C6H4(AsMe2)2} 2][MF6] which were similarly characterised, including by the X-ray structure of [NbF4{o-C6H4(AsMe 2)2}2][NbF6]. These are very rare examples of arsine complexes of high valent metal fluorides. The chloro complexes [NbCl4{o-C6H4(PMe2) 2}2]Cl, [TaCl4{o-C6H 4(PMe2)2}2][TaCl6], [NbCl4{Me2P(CH2)2PMe 2}2][NbCl6] and [MCl4{o-C 6H4(AsMe2)2}2][MCl 6] were prepared and their structural and spectroscopic properties compared with the fluoride analogues. Attempts to prepare diphosphine complexes of NbOF3 were unsuccessful, but the NbOCl3 complexes, [{{Me2P(CH2)2PMe2}NbOCl 3}2{mu-Me2P(CH2) 2PMe2}] and [{o-C6H4(PMe 2)2}NbOCl3(mu-O)NbCl3(CH 3CN){o-C6H4(PMe2)2}] were obtained. X-Ray structures are also reported for [NbCl4{o-C 6H4(PMe2)2}2]Cl, [NbCl4{o-C6H4(AsMe2) 2}2][NbCl5(OEt)], [NbCl4{o-C 6H4(PMe2)2}2][NbOCl 4(CH3CN)], [{{Me2P(CH2) 2PMe2}NbOCl3}2{mu-Me 2P(CH2)2PMe2}] and [{o-C 6H4(PMe2)2}NbOCl3(mu-O) NbCl3(CH3CN){o-C6H4(PMe 2)2}].
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Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate