Question

5.0 -37.5 oppm (b) .35 (a) P (a) Predict the structure of SF4 using the VSEPR model. (b) Account for the fact that at 298 K and in solution the ''F NMR spectrum of SF4 exhibits a singlet but that at 175 K, two equal-intensity triplets are observed. 36 The ''F NMR spectrum of each of the following molecules exhibits one signal. For which species is this observation consistent with a static molecular structure as predicted by the VSEPR model: (a) SiF4; (b) PFs; (c) SF6; (d) SOF2; (e) CF4? notation

Answer 1

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stu nswer `s Pi at low tempreature Corsk) two equal intenities triplets all observed den to 2 signals of a diffent Flowerne atom. but as tempreature increases Signal broaden and collapses to one rigual rigual come close together - and get only one.. triplet triplet A at 975 K - singlet at 228k. this phenomenon is known as tempreatur effect -

sifu structure 2 steudtrice of of One ugual 196 spentrum Sfo iteti