Average e.s.d. of C-C Bonds

The average estimated standard deviation (e.s.d.) [standard uncertainty (s.u.)] of the carbon-carbon bond lengths in a structure provides a rough measure of precision. In searching the CSD, you can either accept any value or restrict hits to values < 0.005Å. The latter option limits hits to more precise structure determinations.

 

In certain entries, if no carbon-carbon e.s.d.s are available, then the value may be derived from C-N, C-O, N-N, N-O, O-O e.s.d.s

 

To Search:

•	Select the Experimental button in the Build Queries pane (see Using the Experimental Dialogue Box).