Abstract
The synthesis and characterization of Ru(H)2(ortho-OC6H4E)L2 (L = PiPr3, E = NH, O) show these to be dihydrides with a nonoctahedral structure. The former compound reacts with H2 to give Ru(H)3(OC6H4NH2)L2, which has the ability to hydrogenate tBuHCCH2. Osmium analogs are available from Os(H)3ClL2, and the mono-N-methyl example Os(H)2[N(Me)C6H4NH]L2 shows inequivalent hydrides by 1H NMR at 20 °C. It exchanges with D2 faster into the NH site than into the OsH sites. Triflic acid protonates Os(H)2[N(Me)C6H4NH]L2 at the metal to give a trihydride. Catechol protonates Os(H)2[N(Me)C6H4NH]L2 to displace the ortho-diamine to give Os(H)2(OC6H4O)L2. The collective evidence is consistent with a dianionic, not a quinoid oxidation state for the chelate ligands and a d4, six-coordinate potential energy surface, often with low barriers between alternative non-octahedral structures.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
