Tertiary Phosphine and Arsine Complexes of Phosphorus Pentafluoride: Synthesis, Properties, and Electronic Structures.
Tertiary Phosphine and Arsine Complexes of Phosphorus Pentafluoride: Synthesis, Properties, and Electronic Structures.
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五氟化磷的叔膦和胂络合物:合成、性质和电子结构。
DOI:
10.1021/acs.inorgchem.9b03630
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发表时间:
2020
影响因子:
4.6
通讯作者:
Dyke JM
中科院分区:
文献类型:
--
作者:
Dyke JM
The reaction of PMe3or PPh3with PF5in anhydrous CH2Cl2or hexane forms the white, moisture-sensitive complexes [PF5(PR3)] (R = Me, Ph). Similar reactions involving the diphosphineso-C6H4(PR2)2afford the complexes [PF4{o-C6H4(PR2)2}][PF6]. The X-ray structures of [PF5(PR3)] and [PF4{o-C6H4(PMe2)2}][PF6] show pseudo-octahedral fluorophosphorus centers. Multinuclear NMR spectra (1H,19F{1H},31P{1H}) show that in solution in CH2Cl2/CD2Cl2the structures determined crystallographically are the only species present for [PF5(PMe3)] and [PF4{o-C6H4(PMe2)2}][PF6] but that [PF5(PPh3)] and [PF4{o-C6H4(PPh2)2}][PF6] exhibit reversible dissociation of the phosphine at ambient temperatures, although exchange slows at low temperatures. The complex19F{1H} and31P{1H} NMR spectra have been analyzed, including those of the cation [PF4{o-C6H4(PMe2)2}]+, which is a second-order AA′XX′B2M spin system. The unstable [PF5(AsMe3)], which decomposes in a few hours at ambient temperatures, has also been isolated and spectroscopically characterized; neither AsPh3nor SbEt3forms similar complexes. The electronic structures of the PF5complexes have been explored by DFT calculations. The DFT optimized geometries for [PF5(PMe3)], [PF5(PPh3)], and [PF4{o-C6H4(PMe2)2}]+are in good agreement with their respective crystal structure geometries. DFT calculations on the PF5-L complexes reveal the P–L bond strength falls with L in the order PMe3> PPh3> AsMe3, consistent with the experimentally observed stabilities, and in the PF5-L complexes, electron transfer from L to PF5on forming these complexes also follows the order PMe3> PPh3≈ AsMe3.
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DOI:
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发表时间:
1987
期刊:
影响因子:
--
作者:
D. Mootz;M. Wiebcke
通讯作者:
M. Wiebcke
DOI:
--
发表时间:
1966
期刊:
影响因子:
--
作者:
Ruth A. Goodrich;P. Treichel
通讯作者:
P. Treichel
DOI:
--
发表时间:
1997
期刊:
影响因子:
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作者:
A. Arduengo;R. Krafczyk;W. Marshall;R. Schmutzler
通讯作者:
R. Schmutzler
影响因子:
2.8
作者:
Greenacre, Victoria K.;Levason, William;Reid, Gillian
通讯作者:
Reid, Gillian
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
P. Kilian;D. Philp;A. Slawin;J. Woollins
通讯作者:
J. Woollins