Next April Shinin 23 DISCUSSION Suppose SF had a pentagonalp

Next April Shinin 23. DISCUSSION Suppose SF, had a pentagonalp with a capping F ligand) as illustrated below: Certif NMR spectrum of this hypothetical structure? which of the following would be expected for the All F\'s are identical, so only one peak will be present in the NMR spectrum. Five F\'s are identical, one different, so the NMR spectrum will show two peaks in 5:1 intensi Five F\'s are identical, one different, so the NMR spectrum will show two peaks in 1:1 intensi ratio. ratio. All six F\'s are different, so the NMR spectrum will show six equal intensity peaks. ANSWERED-CHANGES ALLOWED

Solution

Option (a). All F\'s are identical, so only one peak will be present in the NMR spectrum.

This is because the F-atoms show fluxional behaviour will be interchanging there positions. NMR is a slow technique so at room temperatures what you see are the average results when you have fluxional behaviour.