Organometallic ammine complexes: The preparation and X-ray crystal structure of [(η5-C5H5)Ru(PPh3)2(NH3)]PF6 and [(η5-C5H5)Ru(PPh3)(CNtBu)(NH3)]PF6

(tert-Butyl isocyano-C)(carbonyl)(η5-cyclopentadienyl)(triphenylphosphine-P)ruthenium(II) hexafluorophosphate

“…Both the Ru--P bond length, 2.328 (1)/~, and Ru---C(N) distance, 1.961 (4) A, are longer than the 2.290 (1) and 1.934 (5)A, respectively, found in [Ru(CN/Bu)(PPh3)(NH3)(r/5-C5 -Hs)]PF6 (Conroy-Lewis & Simpson, 1990). This reflects the increased competition for zr-electron density at the metal as a result of replacing an ammine group with a carbonyl group.…”

“…The variation in structural parameters of the triphenylphosphine and tertbutyl isocyanide ligands for a series of compounds containing this moiety might illuminate the unusual electronic character responsible for this reactivity. We previously reported the crystal structure of [Ru(CN/Bu)(PPh3)(NH3)(r/5-CsHs)]PF6, where the additional ligand was a pure or-donor (Conroy-Lewis © 1993 International Union of Crystallography Printed in Great Britain -all rights reserved & Simpson, 1990), and we present here the structure of [Ru(CWBu)(CO)(PPh3)(r/5-CsHs)]PF6, where the carbonyl ligand is an archetypal good rr-acceptor and poor or-donor. The compound has been reported previously (Conroy-Lewis, Redhouse & Simpson, 1989).…”

Catalytic Ammonia Oxidation to Dinitrogen by Hydrogen Atom Abstraction

“…While cationic [Cp R Ru(diphosphine)(L)] + (Cp R = Cp or Cp*; L = NH 3 or N 2 )c omplexes are known, [28,29] the stability of NH 3 and N 2 binding has not been established for complexes containing pendant amine groups that could interact with ligands bound to Ru. While cationic [Cp R Ru(diphosphine)(L)] + (Cp R = Cp or Cp*; L = NH 3 or N 2 )c omplexes are known, [28,29] the stability of NH 3 and N 2 binding has not been established for complexes containing pendant amine groups that could interact with ligands bound to Ru.…”

Synthesis of chiral-at-metal half-sandwich ruthenium(II) complexes with the CpH(PNMent) tripod ligand

“…However, both reactions of (L Ment ,S C ,R Ru )-5 with piperidine and morpholine, respectively, and NH 4 PF 6 gave a mixture of diastereomers of the same compound (54% yield for piperidine; 63% for morpholine). The IR spectra showed N-H bands at 3356 and 3282 cm À1 [14]. In the ESI-MS spectrum in dichloromethane a cation of m/z 917 was observed which corresponded to [Cp(PN Ment )Ru(PPh 3 )-NH 3 ] + .…”

“…This suggests that the product was (L Ment ,S C ,R Ru )-and (L Ment ,S C ,S Ru )-9 with ammonia coordinated to the ruthenium center corroborated by the data of the elemental analysis (see Scheme 3). It has been reported that an ammine-ruthenium(II) complex [CpRu(PPh 3 ) 2 NH 3 ]PF 6 was prepared by the reaction of [CpRu(PPh 3 ) 2 Cl] with NH 4 PF 6 in the presence of thallium(I) carbonate in methanol [14]. In this reaction, the thallium(I) cation scavenged the chloride anion and the carbonate ion removed a proton from the ammonium ion.…”