A 1H-13C HSQC is frequently used to assist in assigning a carbon as CH, CH2 or CH3 (additional blog here). The purpose of this puzzle is to examine a non-standard assignment.
The 1H-13C HSQC below shows 2 correlations for each carbon at 121 and 134 ppm. Given also the information on the 1H integrals on the F2 axis, are the carbons at 121 and 134 ppm really CH2’s?
It’s been a busy week with work and I'm expecting the same for next week. The blog P2C2E will be on hiatus for 2 weeks from February 7 to 18. Posts will resume the following week.
Stay tuned for more logic puzzles.
February 1, 2011 marks the third year anniversary of the weblog P2C2E. This milestone is dedicated to you the loyal readers. Thank you.
I am happy to write that the blog has grown linearly in site visits per year.
Although the number of posts has dropped, due to workload and travel, the number of email subscribers has not. Readership comments have been fairly constant. The top blog in 2010 reached 368 visits.
The statistics are based on results from Google Feedburner and Typepad.
