170379-82-5

Upstream product

• 158730-67-7 [(((C₆H₅)2PCH₂Si(CH₃)2)2N)Cr]2(Cl)2 
• 158758-82-8 Cr(CH₃)(N(Si(CH₃)2CH₂P(C₆H₅)2)2) 
• 542-92-7 cyclopenta-1,3-diene 

Downstream Products

• 221156-09-8 Cr(C₅H₅)(CH₂C₆H₅)(N(Si(CH₃)2CH₂P(C₆H₅)2)2) 

Relevant academic research and scientific papers

Synthesis and structure of even-electron paramagnetic chromium(II) complexes

In an effort to develop the coordination chemistry of Cr(II), we have prepared the starting chloro-bridged dimer {[(Ph2PCH2SiMe2)2N]Cr} 2(μ-Cl)2 by reaction of the lithium salt LiN-(SiMe2CH2PPh2)2 with CrCl2·-THF. Subsequent replacement of the remaining chloride leads to the formation of mononuclear organochromium complexes of the general formula CrR-[N(SiMe2CH2PPh2)2] (R = Me, CH2Ph, C5H5). The methyl and benzyl complexes display nearly planar geometries around each Cr(II) and both show high-spin (spin-only) d4 configurations; the solid-state structure of the benzyl derivative shows that the benzyl ligand is bound in an η2 fashion. The cyclopentadienyl derivative is low spin (two unpaired electrons) and shows a geometry with the tridentate ligand in a distorted facial orientation and the cyclopentadienyl unit η5-bound. Semiempirical ZINDO restricted open-shell Hartree-Fock studies confirm the stabilities of the various spin states of the isolated complexes.