29890-04-8 Bis-1,2-diphenylphosphinoethanetetracarbonylchromium Chromium, tetracarbonyl[1,2-ethanediylbis[diphenylphosphine]-P,P']-, (OC-6-2)- Chromium, tetracarbonyl[ethylenebis[diphenylphosphine]]-, cis- NSC193742