B.T. Donovan, R.P. Hughes, H.A. Trujillo and A.L. Rheingold
Steric Congestion in a Cyclopentadienyl Ligand Bearing t-Butyl
Groups on Three Contiguous Carbon Atoms.
Crystal and Molecular Structure of
(η5-1,2,3-Tri-t-butylcyclopentadienyl)(η5-indenyl)rhodium(III)
Hexafluorophosphate.
Organometallics, 1992, 11, 64.
O.J. Curnow, R.P. Hughes, and A.L. Rheingold
An (η2–Tetrafluoroethylene)ruthenium Complex with a
Metallacyclopropane Structure but with a Low Barrier to
Propeller Rotation
J. Am. Chem. Soc., 1992, 114, 3153.
O.J. Curnow and R.P. Hughes
[Ru(η5–C5Me5)(η5–C5F5): The First Transition Metal Complex
Containing a Perfluorocyclopentadienyl Ligand
J. Am. Chem. Soc., 1992, 114, 5895.
B.T. Donovan, R.P. Hughes, A.S. Kowalski, H.A. Trujillo,
and A.L. Rheingold
Stereospecific Rhodium Promoted Ring Closure of an
η4–1,3-Pentadienediyl Ligand to an η4–1,3-Cyclopentadiene, with
Subsequent Stereo– and Regiospecific endo–H Migration:
Molecular Structure of [Rh(η5-C5H5)(1–4η–C5H3–1,2,exo–5-tBu3)]
Organometallics, 1993, 12, 1038.
R.P. Hughes, H.A. Trujillo, and Arnold L. Rheingold
α-C–H and α'-C–C Bond Cleavage in an Iridacyclohexadiene.
Interchange of α–Hydrogen and α'–Phenyl Substituents without
Accompanying Skeletal Rearrangement.
J. Am. Chem. Soc., 1993, 115, 1583.
D.E. Richardson, M.F. Ryan, W.E. Geiger, T.T. Chin, R.P. Hughes,
and O.J. Curnow
Gas-Phase and Solution Studies of the Oxidation of the
First Perfluorocyclopentadienyl Complex [Ru(η5–C5Me5)(η5–C5F5)]
Organometallics, 1993, 12, 613.
D.L. Lichtenberger, M.L. Hoppe, L. Subramanian, E.M. Kober,
R.P. Hughes, J.L. Hubbard, and D.S. Tucker,
Electron Distribution and Bonding in η3–Cyclopropenyl Complexes
Organometallics, 1993, 12, 2025.
R. Ditchfield, R.P. Hughes, D.S. Tucker, E.P. Bierwagen,
J. Robbins, D.J. Robinson, and J. A. Zakutansky
Synthesis and Dynamic NMR Studies of η3–Triphenyl– and
η3–Trimethylcyclopropenyl Complexes of Ruthenium,
[Ru(η5-C5R5)(η3-C3R'3)X2] (R = H, Me; R' = Me, Ph; X = Cl, Br, I).
Extended Hückel Molecular Orbital Study of Barriers to Rotation
of η3-Cyclopropenyl Ligands in Isoelectronic Ruthenium
and Molybdenum Complexes
Organometallics, 1993, 12, 2258.
R.P. Hughes, D.S. Tucker, and A.L. Rheingold
Preparation and Dynamic Behavior of η3-Cyclopropenyl Complexes
of Cobalt, Rhodium, and Iridium.
Crystal and Molecular Structure of [Ir(η3–C3tBu3)(CO)3.
Organometallics, 1993, 12, 3069.
O.J. Curnow, R.P. Hughes, E.N. Mairs, and A. L. Rheingold
Facile Propeller Rotation in Metallacyclopropanes.
Synthesis and Dynamic Behavior of New
Tetrafluoroethylene–Ruthenium Complexes.
Crystal and Molecular Structure of [Ru(η5–C5Me5)Cl(η2–C2F4)]2Organometallics, 1993, 12, 3102.
R.P. Hughes, P.R. Rose, and A. L. Rheingold
Transition Metal Chemistry of Hexafluorobutadiene.
Facile Hydrolysis of Hexafluoro-1-metalla-3-cyclopentene
Rhodium Complexes to give
Tetrafluoro-1-metalla-3-cyclopentene-2-one and
Tetrafluoro-1-metalla-2-cyclopentene-4-one Complexes.
Crystal and Molecular Structures of
trans–[(Rh–CF2CF=CF–CO)Cl(PPh3)2],
mer–[(Rh–CF2CF=CF–CF2)Cl(PMe3)3], and
mer–[(Rh–CF=CF–CO–CF2)Cl(PMe3)3]
Organometallics, 1993, 12, 3109.
J.-K. Shen, D.S. Tucker, F. Basolo, and R.P. Hughes
Kinetics of CO Substitution in Reactions of η3-Cyclopropenyl
Complexes of Iron, Cobalt, Rhodium, and Iridium with Phosphorus
Ligands. The First Examples of a Dissociative Mechanism
for CO Substitution in the Cobalt Triad Carbonyl Complexes
J. Am. Chem. Soc., 1993, 115, 11312.
R. P. Hughes and D. S Tucker
η3–Cyclopropenyl is Isolobal with NO, but not with
η3–Propenyl (Allyl): Evidence from Conformational Preferences and Rotational Barriers in Alkene and Alkyne Complexes of Iridium.
Organometallics, 1993, 12, 4736.
R.P. Hughes, A. S. Kowalski, and B. T. Donovan
Unusual Rhodium Promoted Reaction of a Vinylcyclopropene
to give a Cyclobutadiene Ligand.
Formation of (η5–Pentamethylcyclopentadienyl)-
[η4–Tri-t-butyl(methyl)cyclobutadiene]rhodium.
J. Organomet. Chem.,1994, 472, C18.
R. P. Hughes, X. Zheng, R. L. Ostrander, and A. L. Rheingold
Synthesis and Molecular Structure of [Ru(η5–C5H5)(η5–C5F5)].
Intramolecular Structural Comparison of the Cyclopentadienyl
Ligand with its Perfluorinated Analogue.
Organometallics, 1994, 13, 1567.
R.P. Hughes, A. S. Kowalski, J. R. Lomprey, and A.L. Rheingold
Preparation of the 1,2-di–tert–Butylcyclopentadienyl Anion
and a Transition Metal Derivative.
Crystal Structure of 1,1',2,2'-tetra-tert-butylferrocene.
Organometallics, 1994, 13, 2691.
R. P. Hughes, O. J. Curnow, E.N. Mairs, P. R. Rose, X. Zheng,
and A. L. Rheingold
New and Revisited Transition Metal Chemistry of
Fluoro-Olefins and Fluoro-Dienes
Adv. Chem. Ser., 1994, 515, 252.
R.P. Hughes, D.S. Tucker, and A.L. Rheingold
Reversible Insertion of Iridium into a Cyclopropenyl
Carbon–Carbon Bond
Organometallics, 1994, 13, 4664.
B. T. Donovan, R. P. Hughes, P. P. Spara, and A. L. Rheingold
Unusual Chloropalladation of
1,2,3-Tri-tert-butyl-3-vinyl-1-cyclopropene to give an
η3-Chloromethylcyclobutenyl Ligand. Crystal and Molecular
Structures of Di-μ-chlorobis[(1–3η)-4-endo-chloromethyl-1,2,3-
tri-tert-butylcyclobutenyl]dipalladium and
Tetra-μ-chlorobis[(1–3η)-4-endo-chloromethyl-1,2,3-
tri-tert-butylcyclobutenyl]tripalladium.
Organometallics, 1995, 14, 489.
R.P. Hughes, P. R. Rose, X. Zheng, and A. L. Rheingold
Synthesis and Molecular Structure of the First Example of an
η4–Complex of Hexafluorobutadiene: [RuCl(η5–C5Me5)(η4–C4F6)].
Structural Comparison of Coordinated Butadiene and its
Perfluorinated Analogue.
Organometallics, 1995, 14, 2407.
R. P. Hughes, H. A Trujillo, and A. J. Gauri
Stereoselective Ring Expansion of 3–Vinyl–1–cyclopropenes
to Give η5–Cyclopentadienyl(ruthenium)
and η4–Cyclohexadienone(iron) Complexes.
Exclusion of Planar Metallacyclohexadiene
Intermediates and Relevance to the Dötz Reaction.
Organometallics, 1995, 14, 4319.
R.P. Hughes and J.R. Lomprey
Tin and Thallium Reagents for Transfer of the
1,2‑di‑tert‑Butylcyclopentadienyl Ligand to Transition Metals.
Inorg. Chim. Acta, 1995, 240, 653.