Coordinated amine hydrogens from

Table VII. Ionization Constants for the Loss of Coordinated Amine Hydrogens from Cu(III)—Peptide Complexes0...

Intramolecular Hydrogen Bonding from Coordinated Amine to Uncoordinated Phosphate Group... 

Note Deprotonation of the palladium coordinated amine is difficult and dependant upon the choice of base. Sodium hydride is a strong base and upon abstraction of a proton produces molecular hydrogen, which evolves from the reaction without reacting with the palladium centre. 

FIGURE 12. Structure of the E coli Amine Oxidase active site in die catalytically-active crystal form. Copper coordination and hydrogen bonds are shown by dashed lines and dotted lines respectively. Also shown are TPQ in its active conformation, die active site base Asp383, the conserved Tyr369 and a water molecule (W2) observed in most crystal forms of amine oxidases from various organisms. The equatorial water (We) is shown in parendieses since it is labile, variable in position and is absent in some crystal forms. 

Dihydridotetrakis (triphenylphosphine) ruthenium(II), RuH2 [P(Ph)3]4, exhibits excellent catalytic activity under mild conditions, transferring hydrogen from ethers, decaline, tertiary amines, and alcohols to aldehydes in about 50% yields. Coordination of the... 

The immediate product from the reaction of the hydride complex with ketone has been a subject of debate. Some have proposed that an alkoxide complex is formed and that proton transfer between the coordinated amine and the alkoxide then forms the alcohol that is ultimately released. Others have supported a direct transfer to form free alcohol (or amine) and then coordination of this species to the open To accommodate the isotope effect data and the absence of an open coordination site for coordination of the ketone, the formation of the alkoxide from the hydride has been proposed to occur by hydride transfer assisted by hydrogen bonding of the amine in the case of the reactions with [Ru(BINAP)(diamine)(H)j], or by ring slip to allow coordination of the ketone (or imine) in the case of the reactions with the Shvo catalyst. ... 

It is well known from classical organometallic chemistry that non-coordinating amine bases affect the behavior of H2 complexes [44]. The azadithiolate motif has been exploited in the design of new catalysts for hydrogen oxidation, as described in the next section on [NiFe] hydrogenases [45]. 

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