ADVERTISEMENT
2 /3 FREE ARTICLES LEFT THIS MONTH Remaining
Chemistry matters. Join us to get the news you need.

If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)

ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.

ENJOY UNLIMITED ACCES TO C&EN

Synthesis

A ChemDraw Flaw

November 3, 2014 | APPEARED IN VOLUME 92, ISSUE 44

The article about ChemDraw shows that the structure-drawing program is clearly useful (C&EN, Aug. 18, page 26). However, in my experience it has one flaw. Students are consistently asked to submit their proposed structures with the samples before we do a mass spectrum. How is it possible that ChemDraw allows a unique property of the molecule (its exact mass) to be listed as a variable?

Explaining this to students is fine, but to ChemDraw it’s different. Change the number of decimal places to four, never touch it again, and all will be fine.

Richard Kondrat
Riverside, Calif.

X

Article:

This article has been sent to the following recipient:

Comments
Alan Gorman (November 4, 2014 7:28 AM)
I am unsure what is meant in the above letter. ChemDraw does not treat the Exact Mass of a structure as a variable in any regard. It does allow the user to control the number of decimal places to which the value is reported, which may lead to rounding, but I would not characterize that flexibility as a flaw. If the author has indeed stumbled upon a defect I would encourage him to contact customer support and report his observations so any problem can be addressed.

Leave A Comment

*Required to comment