Tetracarbonyl[N-(diphenylphosphanyl-κP)-N,N′-diisopropyl-P-phenylphosphorus diamide-κP]molybdenum(0) with an unknown solvent

Abstract

The title complex, [Mo(C24H30N2P2)(CO)4], contains a molybdenum centre bearing a P,P′-cis-chelating Ph2PN( i Pr)P(Ph)NH( i Pr) and four carbonyl ligands in a distorted octahedral coordination geometry. This results in a nearly planar four-membered metallacycle. In the crystal, molecules are linked by N—H...O and C—H...O hydrogen bonds to form layers parallel to the ac plane. For the final refinement, the contributions of disordered solvent molecules were removed from the diffraction data with SQUEEZE in PLATON [Spek (2015). Acta Cryst. C71, 9–18]. The given chemical formula and other crystal data do not take into account the unknown solvent molecule(s).

PNPN‐H in Comparison to other PNP, PNPN and NPNPN Ligands for the Chromium Catalyzed Selective Ethylene Oligomerization

“…Regarding the coordination chemistry of the new selective trimerization ligands Ph 2 PN( i Pr)P(Ph)N(R)H (R= i Pr, Et) some more experiments and tests in catalysis followed . For this reason, the chromium(0) complexes [Cr(CO) 4 {Ph 2 PN( i Pr)P(Ph)NH(R)‐ P,P′ }] with R= i Pr and Et as well as [Cr(CO) 3 {(NCCH 3 ){Ph 2 PN( i Pr)P(Ph)NH( i Pr)‐ P,P′ }] were prepared, following the method of Wass and co‐workers, as well as the corresponding molybdenum complex [Mo(CO) 4 {Ph 2 PN( i Pr)P(Ph)NH( i Pr)‐ P,P′ }] (Scheme ) …”