21034-84-4

Upstream product

• 17427-91-7 1,2-bis(diphenylphosphino)ethylene 
• 199620-14-9 chromium⁽⁰⁾ hexacarbonyl 
• 75194-41-1 {(CO)4Cr(μ-pentamethylenediazirine)2Cr(CO)4} 
• 983-80-2 cis-1,2-bis-(diphenylphosphino)ethene 

Downstream Products

• 152075-71-3 (CH₃)2N(CH₂)3NHCH₂CH(P(C₆H₅)2)2Cr(CO)4 

Relevant academic research and scientific papers

Transition Metal Complexes of Diazenes, XXX. - On the Photoreaction of Octacarbonyl Dimetallaheterocycles with Bis(phosphanes)

Irradiation of (CO)4Cr(μ-pmd)2Cr(CO)4 (1) (pmd = 3,3-pentamethylenediazirine) in the presence of bis(dimethylphosphanyl)methane (dppm) affords (CO)3Cr(μ-pmd)2(μ-dppm)Cr(CO)3 (2b) and (CO)4Cr(μ-pmd)(μ-dppm)Cr(CO)4 (3b) which both contain boat-like dimetallaheterocyclic rings as indicated by X-ray analysis.Contrary to that, in the presence of cis-1,2-bis(diphenylphosphanyl)ethene the reaction affords the known Cr(CO)4(cdpe) (4c) by complete cleavage of the dimetallaheterocycle.Key Words: Dichromium carbonyls / Diazirine complexes / Dimetallaheterocycles / Photosubstitution / Bis(phosphanes)