Zhang, Jing published the artcileElectron-Rich, Bulky Ruthenium PNP-Type Complexes. Acceptorless Catalytic Alcohol Dehydrogenation, Formula: C23H43NP2, the publication is Organometallics (2004), 23(17), 4026-4033, database is CAplus.
Reaction of the electron-rich, bulky tridentate PNP ligand (2,6-bis-(di-tert-butylphosphinomethyl)pyridine) with Ru(PPh3)3Cl2 at 65° gave a solution containing the dinitrogen monomeric Ru(II) complex, Ru(PNP)(N2)Cl2 (1a), and the N2-bridged dinuclear Ru(II) complex, [Ru(PNP)Cl2]2(μ-N2) (1b), which can be interconverted. Passing Ar through the solution gave pure 1b. The Ru(II) hydride dinitrogen complex, [Ru(PNP)N2(Cl)(H)] (2), was obtained by the reaction of complex 1b with 2 equiv of NaBEt3H. Complex 1b reacted with 4 equiv of AgOCOCF3 to yield [Ru(PNP)(CF3COO)2], 3. The Ru(II) carbonyl hydride complex, [Ru(PNP)H(OAc)2] (4) was obtained by the reaction of PNP and Ru2(OAc)4 in MeOH as a result of O-H activation and decarbonylation of MeOH. Complexes 1b, 2, and 4 were structurally characterized by x-ray crystallog. Complexes 1b and 2 catalyze the dehydrogenation of secondary alcs. to the corresponding ketones with good yields and high selectivity accompanied with the evolution of dihydrogen in a homogeneous system without a need for a H acceptor. The presumed intermediate Ru dihydride complex is generated in situ by reaction 1b or 2 with a base (1 equiv for each Ru-Cl bond), and the reaction can proceed in the absence of excess base or acid.
Organometallics published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C8H16O2, Formula: C23H43NP2.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem