Dipyrazolyl ketone

Trofimenko also envisioned polypyrazolyl compounds of Be, Al, Ga, In, C, Si and P and prepared some alkane ligands and their complexes.1,2 A few other applications of polypyrazolylalkane ligands have been mentioned in passing in the sections dealing with cobalt and platinum complexes. The reactions of dipyrazolyl ketone to produce [Co(OC(pz)2)Cl2] and [Co(Me2C(pz)2)Cl2], the latter from acetone, are very unusual55 but do not seem to have been exploited further (Scheme 2). 

---