六氟化钨和氧化四氟化钨衍生物的双磁共振研究

W. Mcfarlane, A. M. Noble, J. M. Winfield
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引用次数: 31

摘要

化合物WF6-n (OR)n(R = Me, n= 1-5;采用19F - {183W}、19F - {19F}、1H - {19F}和1H - {31P}双共振技术研究了R = Ph, n= 1,2)、WOF4L [L = Me2O或(MeO)2P(O)Me]和(MeO)3PMe+WOF5 -。报道了183W的化学位移,讨论了影响这些变化的因素和19F的位移。通过类似的技术,确定了WOF4、OS(OMe)2和µ-氟双[氧四氟钨酸盐(VI)]阴离子W2O2F9 -是WF5OMe与(MeO)2SO反应的产物。耦合常数2J(FcFt)、1J(FcW)和1J(FtW)(分别对氧为Fc、Ft、顺式和反式)在WF5OR和顺式- wf4 (OMe)2中符号相同,但在WOF5 -和W2O2F9 -中,1J(FcW)与J(FcW)和J(FcFt)符号相反。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Magnetic double-resonance study of some derivatives of tungsten hexafluoride and tungsten oxotetrafluoride
The compounds WF6–n(OR)n(R = Me, n= 1–5; R = Ph, n= 1,2), WOF4L [L = Me2O or (MeO)2P(O)Me] and (MeO)3PMe+WOF5– have been studied by use of 19F–{183W}, 19F–{19F}, 1H–{19F}, and 1H–{31P} double-resonance techniques. 183W Chemical shifts are reported and the factors affecting these and the 19F shifts are discussed. By similar techniques WOF4,OS(OMe)2 and the µ-fluoro-bis[oxotetrafluorotungstate(VI)] anion, W2O2F9–, have been identified as products from the reaction of WF5OMe with (MeO)2SO. The coupling constants 2J(FcFt), 1J(FcW), and 1J(FtW)(Fc,Ft, cis and trans respectively to oxygen) all have the same sign in WF5OR and cis-WF4(OMe)2 but 1J(FcW) is of opposite sign to J(FcW) and J(FcFt) in WOF5– and W2O2F9–.
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