December 22, 2024, 06:01:44 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Why does increasing electron density near Boron cause a downfield shift?  (Read 2932 times)

0 Members and 1 Guest are viewing this topic.

Offline SheffieldWednesday4ever

  • Regular Member
  • ***
  • Posts: 38
  • Mole Snacks: +0/-0
Why does increasing electron density near Boron cause a downfield shift?
« on: October 16, 2011, 02:05:43 AM »
I know for C and H-NMR, that higher electron density near the nuclei means a more downfield shift (greater +ppm). But for 11B-NMR, the chemical shift of the signal in Me2B(ethane) is 86.8, and for Me2B(ethene), it's 56.4. Shouldn't the ethene species be higher considering there is higher electron density?
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links