Cyclopentadienyl nickel nitrosyl Tags: Chemical Compound, Chemical Substance.Cyclopentadienyl nickel nitrosyl is a blood-red color liquid. It was discovered by a team at The International Nickel Company. The molecular formula is (C5H5)NiNO. It can be prepared by treating nickelocene with nitric acid.Extremely toxic(T+) thumbnail IUPAC name azanylidyneoxidanium;cyclopenta-13-diene;nickel Learn more... Loading...