The coordination chemistry of CrCl3 with three pentadentate
N triple bond distance yet observed (1.66 Å) was found after re-refinement to be an artifact of positional disorder of the Cr atoms of 73% nitrido and 27% hydroxo species. The re-refined Cr
N bond distance is estimated as 1.58 Å, which agrees well with the observed Cr
N stretching frequency of 971 cm−1 found by
![Graphical abstract: Bond distances are not always what they appear to be: discovery and un-discovery of the longest Cr(v) [[triple bond, length as m-dash]] N triple bond](http://hg.y866.cn/compound/lib/scimg/usr/1/B717618J.jpg)