All Department Publications

Found 56 results
Author Title Type [ Year(Asc)]
Filters: Author is Powell, D. R.  [Clear All Filters]
2004
Tran NT, Powell DR, Dahl LF. Generation of AuPd22/Au2Pd21 analogues of the high-nuclearity Pd-23(CO)(20)(PEt3)(10) cluster containing 19-atom centered hexacapped-cuboctahedral (nu(2)-octahedral) metal fragment: structural-to-synthesis approach concerning formation of Au2Pd21(CO)(20)(. Dalton TransactionsDalton Transactions. 2004:209-216.
Tran NT, Powell DR, Dahl LF. Nanosized Au2Pd41(CO)(27)(PEt3)(15) containing two geometrically unprecedented 13-coordinated Au-centered (mu(13)-Au)Pd-13 polyhedra connected by triangular face-sharing and three interpenetrating 12-coordinated Pd-centered (mu(12)-Pd)Au2Pd10 icosahedra: . Dalton TransactionsDalton Transactions. 2004:217-223.
2000
Casey CP, Kraft S, Powell DR. Dimerization of rhenium alkynyl carbene complexes by a process involving two 1,1.5 rhenium shifts and coupling of the remote alkynyl carbons. Journal of the American Chemical Society. 2000;122:3771-3772.
Tran NT, Kawano M, Powell DR, Dahl LF. High-nuclearity Pd(13)Ni(13)(CO)(34) (4-) containing a 26-atom Pd(13)Ni(13) core with an unprecedented five-layer close-packed triangular stacking geometry: possible substitutional Pd/Ni crystal disorder at specific intralayer nickel sites. Journal of the Chemical Society-Dalton Transactions. 2000:4138-4144.
Tran NT, Powell DR, Dahl LF. Nanosized Pd-145(CO)(x)(PEt3)(30) containing a capped three-shell 145-atom metal-core geometry of pseudo icosahedral symmetry. Angewandte Chemie-International Edition. 2000;39:4121-4125.
Kavana M, Powell DR, Burstyn JN. Static versus dynamic Jahn-Teller distortions in octahedral-like copper(II) complexes of 1,4,7-triazacyclononane and 1-oxa-4,7-diazacyclononane: implications for hydrolytic reactivity. Inorganica Chimica Acta. 2000;297:351-361.
1999
Casey CP, Paulsen EL, Beuttenmueller EW, Proft BR, Matter BA, Powell DR. Electronically dissymmetric DIPHOS derivatives give higher n : i regioselectivity in rhodium-catalyzed hydroformylation than either of their symmetric counterparts. Journal of the American Chemical Society. 1999;121:63-70.
Tran NT, Kawano M, Powell DR, Hayashi RK, Campana CF, Dahl LF. Isostructural Au6Pd6(Pd6-xNix)Ni-20(CO)(44) (6-) and Au6Ni32(CO)(44) (6-) clusters containing corresponding nonstoichiometric Au6Pd6(Pd6-xNix)Ni-20 and stoichiometric Au6Ni32 nanosized cores: Substitutional Pd Ni crystal disorder (coloring problem) at onl. Journal of the American Chemical Society. 1999;121:5945-5952.
Hegg EL, Mortimore SH, Cheung CL, Huyett JE, Powell DR, Burstyn JN. Structure-reactivity studies in copper(II)-catalyzed phosphodiester hydrolysis. Inorganic Chemistry. 1999;38:2961-2968.
Appella DH, Christianson LA, Karle IL, Powell DR, Gellman SH. Synthesis and characterization of trans-2-aminocyclohexanecarboxylic acid oligomers: An unnatural helical secondary structure and implications for beta-peptide tertiary structure. Journal of the American Chemical Society. 1999;121:6206-6212.
Appella DH, Christianson LA, Klein DA, Richards MR, Powell DR, Gellman SH. Synthesis and structural characterization of helix-forming beta-peptides: trans-2-aminocyclopentanecarboxylic acid oligomers. Journal of the American Chemical Society. 1999;121:7574-7581.
Nelsen SF, Ismagilov RF, Gentile KE, Powell DR. Temperature effects on electron transfer within intervalence bis(hydrazine) radical cations. Journal of the American Chemical Society. 1999;121:7108-7114.
1998
Chung YJ, Christianson LA, Stanger HE, Powell DR, Gellman SH. A beta-peptide reverse turn that promotes hairpin formation. Journal of the American Chemical Society. 1998;120:10555-10556.
Nelsen SF, Ismagilov RF, Powell DR. Effects of bridge redox state levels on the electron transfer and optical properties of intervalence compounds with hydrazine charge-bearing units. Journal of the American Chemical Society. 1998;120:1924-1925.
Reich IL, Lardy H, Wei Y, Marwah P, Kneer N, Powell DR, Reich HJ. Ergosteroids - III. Syntheses and biological activity of seco-steroids related to dehydroepiandrosterone. Steroids. 1998;63:542-553.
Casey CP, Nash JR, Yu CS, Selmeczy AD, Chung S, Powell DR, Hayashi RK. Kinetic addition of nucleophiles to eta(3)-propargyl rhenium complexes occurs at the central carbon to produce rhenacyclobutenes. Journal of the American Chemical Society. 1998;120:722-733.
Tran NT, Kawano M, Powell DR, Dahl LF. Pd-59(CO)(32)(PMe3)(21): A nanosized metal cluster containing a trigonal D-3 Pd-59 core with 11 interior palladium atoms. Journal of the American Chemical Society. 1998;120:10986-10987.
Nelsen SF, Tran HQ, Ismagilov RF, Ramm MT, Chen LJ, Powell DR. Structural information from hydrazine radical cation optical absorption spectra. Journal of Organic Chemistry. 1998;63:2536-2543.
1997
Krauthauser S, Christianson LA, Powell DR, Gellman SH. Antiparallel sheet formation in beta-peptide foldamers: Effects of beta-amino acid substitution on conformational preference. Journal of the American Chemical Society. 1997;119:11719-11720.
Nelsen SF, Ismagilov RF, Powell DR. Charge-localized p-phenylenedihydrazine radical cations: ESR and optical studies of intramolecular electron transfer rates. Journal of the American Chemical Society. 1997;119:10213-10222.
Casey CP, Czerwinski CJ, Powell DR, Hayashi RK. Cis addition of hydrogen chloride to an amphiphilic carbene complex. Journal of the American Chemical Society. 1997;119:5750-5751.
Casey CP, Paulsen EL, Beuttenmueller EW, Proft BR, Petrovich LM, Matter BA, Powell DR. Electron withdrawing substituents on equatorial and apical phosphines have opposite effects on the regioselectivity of rhodium catalyzed hydroformylation. Journal of the American Chemical Society. 1997;119:11817-11825.
Nelsen SF, Ramm MT, Ismagilov RF, Nagy MA, Trieber DA, Powell DR, Chen X, Gengler JJ, Qu QL, Brandt JL, et al. Estimation of self-exchange electron transfer rate constants for organic compounds from stopped-flow studies. Journal of the American Chemical Society. 1997;119:5900-5907.
Casey CP, Chung S, Ha Y, Powell DR. Formation of platinum allyl and propargyl complexes from protonation of platinum enyne and diyne complexes. Inorganica Chimica Acta. 1997;265:127-138.
McQuade DT, McKay SL, Powell DR, Gellman SH. Indifference to hydrogen bonding in a family of secondary amides. Journal of the American Chemical Society. 1997;119:8528-8532.
Nelsen SF, Ramm MT, Wolff JJ, Powell DR. Intramolecular electron transfer between doubly four sigma-bond-linked tetraalkylhydrazine cationic and neutral units. Journal of the American Chemical Society. 1997;119:6863-6872.
Nelsen SF, Trieber DA, Wolff JJ, Powell DR, RogersCrowley S. Intramolecular electron transfer between doubly six sigma-bond-linked trialkyldiazenium cation and diazenyl radical units. Journal of the American Chemical Society. 1997;119:6873-6882.
Appella DH, Christianson LA, Klein DA, Powell DR, Huang XL, Barchi JJ, Gellman SH. Residue-based control of helix shape in beta-peptide oligomers. Nature. 1997;387:381-384.
Nelsen SF, Klein SJ, Trieber DA, Ismagilov RF, Powell DR. sigma,pi Interaction in halogen-substituted biadamantylidene radical cations. Journal of Organic Chemistry. 1997;62:6539-6546.
Holmgren SK, Savage PB, Desper JM, Schladetzky KD, Powell DR, Gellman SH. Steric control of oxidation selectivity in macrocyclic phosphine oxide-dithioethers. Tetrahedron. 1997;53:12249-12262.
1996
Appella DH, Christianson LA, Karle IL, Powell DR, Gellman SH. beta-peptide foldamers: Robust Helix formation in a new family of beta-amino acid oligomers. Journal of the American Chemical Society. 1996;118:13071-13072.
Nelsen SF, Ismagilov RF, Powell DR. Charge localization in a dihydrazine analogue of tetramethyl-p-phenylenediamine radical cation. Journal of the American Chemical Society. 1996;118:6313-6314.
Nelsen SF, Ramm MT, Wolff JJ, Powell DR. Eclipsed isopropyl conformations of two dimeric hydrazines. Journal of Organic Chemistry. 1996;61:4703-4707.
Nelsen SF, Chen LJ, Ramm MT, Voy GT, Powell DR, Accola MA, Seehafer TR, Sabelko JJ, Pladziewicz JR. Intermolecular electron-transfer reactions involving hydrazines. Journal of Organic Chemistry. 1996;61:1405-1412.
Powell DR, Hanson PE, Gellman SH. {(ıt Z})-2-(Benzoyl-ıt aci}-nitro)-2-phenylacetonitrile}. Acta Crystallographica Section C [Internet]. 1996;52:2945–2946. Available from: http://dx.doi.org/10.1107/S0108270196010827
Kimmich BFM, Landis CR, Powell DR. Synthesis and characterization of boron-containing ferrocenyl ligands for asymmetric catalysis. Organometallics. 1996;15:4141-4146.
Casey CP, Selmeczy AD, Nash JR, Yi CS, Powell DR, Hayashi RK. Synthesis of eta(3)-propargyl rhenium complexes. Journal of the American Chemical Society. 1996;118:6698-6706.
Powell DR, Whipple WL, Reich HJ. Tetrakis(mu(3)-2-methyl-5-thienyl)tetrakis-(diethyl ether-O)-tetrahedro-tetralithium. Acta Crystallographica Section C-Crystal Structure Communications. 1996;52:1346-1348.
1995
Nelsen SF, Chen LJ, Powell DR, Neugebauer FA. 9-(DIISOPROPYLAMINO)-9-AZABICYCLO 3.3.1 NONANE AND TETRAISOPROPYLHYDRAZINE - ISOLABLE RADICAL CATIONS FROM HYDRAZINES WITH NEARLY PERPENDICULAR LONE PAIRS. Journal of the American Chemical Society. 1995;117:11434-11440.
Nelsen SF, Tran HQ, Hiyashi RK, Powell DR, Neugebauer FA. NUCLEOPHILIC CLEAVAGE PRODUCTS FROM BETA-DEPROTONATED SESQUIDIAZABICYCLOOCTANE DICATION. Journal of Organic Chemistry. 1995;60:6756-6763.
Nelsen SF, Wang YC, Hiyashi RK, Powell DR, Neugebauer FA. OXIDIZED PHENYL-SUBSTITUTED SESQUIBICYCLIC HYDRAZINES. Journal of Organic Chemistry. 1995;60:2981-2988.
1994
Panasik N, Eberhardt ES, Edison AS, Powell DR, Raines RT. INDUCTIVE EFFECTS ON THE STRUCTURE OF PROLINE RESIDUES. International Journal of Peptide and Protein Research. 1994;44:262-269.
Nelsen SF, Chang H, Wolff JJ, Powell DR. INFLUENCE OF BF4(-) POSITION ON THE N=N DISTANCE OF TRIALKYLDIAZENIUM CATION SALTS. Journal of Organic Chemistry. 1994;59:6558-6563.
Powell DR, Smith SK, Farrar TC, Ross FK. NEUTRON AND X-RAY-DIFFRACTION STUDY OF MAGNESIUM PHOSPHITE HEXAHYDRATE, MG(H2O)6 2+ PHO3 2. Acta Crystallographica Section C-Crystal Structure Communications. 1994;50:342-346.
Casey CP, Ha YY, Powell DR. SYNTHESIS AND REACTION OF RHENIUM ENYNE, AND VINYLALKENYLIDENE COMPLEXES. Journal of Organometallic Chemistry. 1994;472:185-193.
Casey CP, Ha YK, Powell DR. SYNTHESIS AND REACTIONS OF DIRHENIUM ALKENYLIDENE AND ALKYLIDYNE COMPLEXES. Journal of the American Chemical Society. 1994;116:3424-3428.
1993
Nelsen SF, Wang YC, Powell DR, Hayashi RK. COMPARISON OF EXPERIMENTAL AND CALCULATED GEOMETRIES OF SESQUIBICYCLIC HYDRAZINES. Journal of the American Chemical Society. 1993;115:5246-5253.
1992
Casey CP, Whiteker GT, Melville MG, Petrovich LM, Gavney JA, Powell DR. DIPHOSPHINES WITH NATURAL BITE ANGLES NEAR 120-DEGREES INCREASE SELECTIVITY FOR NORMAL-ALDEHYDE FORMATION IN RHODIUM-CATALYZED HYDROFORMYLATION. Journal of the American Chemical Society. 1992;114:5535-5543.
Wolff JJ, Nelsen SF, Powell DR, Nuber B. PRONOUNCED CONFORMATIONAL-CHANGES IN SIXFOLD NITROGEN-FUNCTIONALIZED METACYCLOPHANES - SYNTHESES AND CRYSTAL-STRUCTURES OF 2 1,10-DIAZA 11 METACYCLOPHANES. Angewandte Chemie-International Edition in English. 1992;31:882-884.
Gellman SH, Powell DR, Desper JM. AN UNUSUAL HYDROGEN-BONDING PATTERN IN A CRYSTALLOGRAPHICALLY OBSERVED BETA-TURN. Tetrahedron Letters. 1992;33:1963-1964.

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