Abstract
The complex ion [Co(1,3-pd3a)NO2]− (pd3a=trimethylenediamine-N,N,N′-triacetate ion) was prepared from equatorial-skew-[Co(1,3-pd3a)H2 O]. The absorption spectrum and the 13C NMR spectrum show the nitro product to be a polar isomer. The diamine backbone ring is believed to have the chair conformation.