Synthetic Route of 32993-05-8, Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a patent, introducing its new discovery.
Optically active transition metal complexes. Part 1151. Synthesis, crystal structure and properties of chiral (eta5-C5H5)Ru complexes with pyrrolecarbaldiminato and salicylaldiminato ligands
The chiral complexes CpRu(LL*)PPh3, Cp = eta5-C5H5, LL*-1 = anion of 2-N-[(S)-1-phenylethyl]pyrrolecarbaldimine (1a/1b), LL*-2 = anion of 2-N-[(R)-hydroxybut-2-yl)]pyrrolecarbaldimine (2a/2b) and LL*-3 = anion of N-[(S)-1-phenylethyl]salicylaldimine (3a/3b), can be prepared by reaction of CpRu(PPh3)2Cl and the corresponding ligand HLL* in boiling toluene. An X-ray structure analysis of diastereomerically pure 1a shows SRu configuration. The phenyl substituent of the ligand adopts a T-shape arrangement with respect to the Cp ring. The PPh3 ligand is in a right handed propeller conformation. The activation parameters of the epimerization 1a ? 1b were determined to be DeltaH? = (133 ¡À 33) kJ mol-1 and DeltaS? = (77 ¡À 26) J K-1 mol-1. The equilibrium ratios are 1a:1b = 86:14, 2a:2b = 1:1 and 3a:3b = 88:12, the attractive interaction between the Cp ring and the phenyl substituent of the chiral center in the chelating ligand LL* favoring one diastereomer of the complexes 1a/1b and 3a/3b.
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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI