Search Results - "Keiter, Ellen A"

Dangling phosphine complexes: Phosphine exchange in pentacarbonyl tungsten complexes of bis(diphenylphosphinomethyl)phenylphosphine by Gamage, Chaminda P., Bailey, Ryan C., Keiter, Ellen A., Kuczynski, John R., Wheeler, Kraig A., Stern, Charlotte L., Brandt, Douglas E., Keiter, Richard L.

“…The reaction of [W(CO)5NH2Ph] with Ph2PCH2PPhCH2PPh2 under mild conditions and stoichiometric control leads to two sets of linkage isomers:…”
Get full text

Intramolecular Exchange of Coordinated and Dangling Phosphine Groups in Pentacarbonyl[(diphenylphosphino)(di-p-tolylphosphino)methane]tungsten(0) by Keiter, Richard L, Chen, Deliang, Holloway, Geoffrey A, Keiter, Ellen A, Zang, Yi, Huml, M. Todd, Filley, Jonathan, Brandt, Douglas E

“…Equilibrium constants and rates have been determined for the isomerization of the linkage isomers (OC)5W­[κ1-PPh2CH2P­(p-tolyl)2] (5) and…”
Get full text

Isomerization and Chelation Studies of (OC)5M[η1-PPh2CH2CH2P(p-tolyl)2] and (OC)5M[η1-P(p-tolyl)2CH2CH2PPh2] (M = Cr, Mo, W) by Keiter, Richard L, Benson, John William, Jia, Zhongjiang, Keiter, Ellen A, Brandt, Douglas E

“…Six dangling phosphine complexes have been synthesized to provide three pairs of linkage isomers, (OC)5M[η1-PPh2CH2CH2P(p-tolyl)2] (3Cr, 3Mo, 3W) and…”
Get full text

Studies of a Reluctant Ligand. An X-ray Crystallographic and NMR Spectroscopic Analysis of (OC)5W(η1-PPh2CH2PPh2) and Its (OC)5W(μ-PPh2CH2PPh2)W(CO)5 Derivative by Benson, John William, Keiter, Richard L, Keiter, Ellen A, Rheingold, Arnold L, Yap, Glenn P. A, Mainz, Vera V

“…Tungsten pentacarbonyl complexes, (OC)5W(η1-PPh2CH2PPh2) (1) and (OC)5W(μ-PPh2CH2PPh2)W(CO)5 (2), have been synthesized from (OC)5WNH2Ph and Ph2PCH2PPh2 in…”
Get full text

Three Isomers in Equilibrium: Phosphine Exchange of Coordinated and Pendant Phosphines in a Unique Complex, (OC) 5 WL (L = 1,2-Bis(diphenylphosphino)-1-di- p -tolylphosphinoethane), and Implications for Understanding the k 2 Term in the Rate Law for Phosphine Substitution in Group 6 Metal Carbonyl Complexes by Van Ausdall, Bret R., Cuddy, Michael F., Southern, Joel S., Wheeler, Kraig A., Keiter, Ellen A., Treadwell, Edward M., Keiter, Richard L.

Get full text

Phosphorus−Phosphorus Coupling Constants in Mixed-Phosphine Tricarbonyl Iron Complexes, Fe(CO)3LL‘. Crystal Structure of trans-Fe(CO)3(PEt3)(PPh3) by Keiter, Richard L, Benson, John William, Keiter, Ellen A, Harris, Travis A, Hayner, Matthew W, Mosimann, Laura L, Karch, Eric E, Boecker, Carol A, Olson, Donna M, VanderVeen, Jennaver, Brandt, Douglas E, Rheingold, Arnold L, Yap, Glenn P. A

“…Mixed-ligand complexes, trans-Fe(CO)3LL‘ (L = PPh3, L‘ = PPh2Me, PPhMe2, PMe3, PPh2Et, PEt3, PPh2CHCH2, PPh2H, AsPh3, P(OPh)3; L = PMe3, L‘ = PEt3, PPh2Et,…”
Get full text

Induced Acceleration of Phosphine Exchange in Metal Carbonyls by Pendant Groups of Coordinated Polyphosphines. Two Dangling Phosphine Arms Are Much Better Than One1 by Keiter, Richard L, Benson, John William, Keiter, Ellen A, Lin, Weiying, Jia, Zhongjiang, Olson, Donna M, Brandt, Douglas E, Wheeler, Jeremy L

“…The kinetics and thermodynamics of isomerization of the linkage isomers (OC)5W[η1-PPh2CH2CH(PPh2)2] (1) and (OC)5W[η1-PPh2CH(PPh2)CH2PPh2] (2) in chloroform…”
Get full text

Induced Acceleration of Phosphine Exchange in Metal Carbonyls by Pendant Groups of Coordinated Polyphosphines. Two Dangling Phosphine Arms Are Better than One by Keiter, Richard L, Benson, John William, Keiter, Ellen A, Lin, Weiying, Jia, Zhongjiang, Olson, Donna M, Brandt, Douglas E, Wheeler, Jeremy L

Get full text

Isomerization of (OC)5WPPh2CH2CH(PPh2)2 by Keiter, Richard L, Keiter, Ellen A, Olson, Donna M, Bush, Jacquelyn R, Lin, Weiying, Benson, John William

Get full text

Deuterium quadrupole coupling constants and asymmetry parameters in bridging metal hydride complexes by Kim, Ae Ja, Fronczek, Frank R, Butler, Leslie G, Chen, Shixiong, Keiter, Ellen A

Get full text

A facile, high-yield synthesis of trans-Fe(CO)3(PR3)2 from Fe(CO)5, Fe(CO)4CHO-, HFe(CO)4-, or HFe(CO)3PR3 by Keiter, Richard L, Keiter, Ellen A, Hecker, Karl H, Boecker, Carol A

Get full text

Oxidation of phosphido-bridged complexes of molybdenum and tungsten. Isolation of [cyclic] [trans-(HPh2P)(OC)3M(.mu.-PPh2)2M(CO)3(PPh2H)][PF6] by Keiter, Richard L, Keiter, Ellen A, Rust, Merle S, Miller, David R, Sherman, Edward O, Cooper, Dwayne E

Get full text

Intramolecular exchange of coordinated and dangling phosphines in pentacarbonyl group 6 complexes of 1,1,2-tris(diphenylphosphino)ethane by Keiter, Richard L., Ye, Ping, Keiter, Ellen A., Benson, John William, Lin, Weiying, Brandt, Douglas E., Southern, Joel S., Rheingold, Arnold L., Guzei, Ilia, Wheeler, Kraig A., Cary, Lew W.

“…Linkage isomers of group 6 pentacarbonyl complexes of 1,1,2- tris(diphenylphosphino)ethane exist in equilibrium at room temperature. A novel intramolecular…”
Get full text

Reactions of molybdenum and tungsten hexacarbonyls with diphenylphosphine and sodium borohydride by Keiter, Richard L, Keiter, Ellen A, Mittelberg, K. Neil, Martin, J. Scott, Meyers, Victoria M, Wang, Jin Guu

Get full text

Three Isomers in Equilibrium: Phosphine Exchange of Coordinated and Pendant Phosphines in a Unique Complex, (OC)5WL (L = 1,2-Bis(diphenylphosphino)-1-di‑p‑tolylphosphinoethane), and Implications for Understanding the k 2 Term in the Rate Law for Phosphine Substitution in Group 6 Metal Carbonyl Complexes by Van Ausdall, Bret R, Cuddy, Michael F, Southern, Joel S, Wheeler, Kraig A, Keiter, Ellen A, Treadwell, Edward M, Keiter, Richard L

“…The linkage isomers [(OC)5W­{κ1-PPh2CH2CH­(PPh2)­[P­(p-tol)2]}] 3a, [(OC)5W­{κ1-P­(p-tol)2CH­(PPh2)­CH2PPh2}] 3b, and [(OC)5W­{κ1-PPh2CH­[P­(p-tol)2]­CH2PPh2}]…”
Get full text

Isomerization and Chelation Studies of (OC) 5 M[η 1 -PPh 2 CH 2 CH 2 P( p -tolyl) 2 ] and (OC) 5 M[η 1 -P( p -tolyl) 2 CH 2 CH 2 PPh 2 ] (M = Cr, Mo, W) by Keiter, Richard L., Benson, John William, Jia, Zhongjiang, Keiter, Ellen A., Brandt, Douglas E.

Get full text

Crystal structure of trans-W2(CO)6(PPh2H)2(μ2-PPh2)2: Crystallographic research by faculty at predominately undergraduate institutions: a selective survey by KEITER, Richard L, MARTIN, J. Scott, KEITER, Ellen A, RHEINGOLD, Arnold L

Get full text

Studies of a Reluctant Ligand. An X-ray Crystallographic and NMR Spectroscopic Analysis of (OC) 5 W(η 1 -PPh 2 CH 2 PPh 2 ) and Its (OC) 5 W(μ-PPh 2 CH 2 PPh 2 )W(CO) 5 Derivative by Benson, John William, Keiter, Richard L., Keiter, Ellen A., Rheingold, Arnold L., Yap, Glenn P. A., Mainz, Vera V.

Get full text

Induced Acceleration of Phosphine Exchange in Metal Carbonyls by Pendant Groups of Coordinated Polyphosphines. Two Dangling Phosphine Arms Are Much Better Than One 1 by Keiter, Richard L., Benson, John William, Keiter, Ellen A., Lin, Weiying, Jia, Zhongjiang, Olson, Donna M., Brandt, Douglas E., Wheeler, Jeremy L.

Get full text

Phosphorus−Phosphorus Coupling Constants in Mixed-Phosphine Tricarbonyl Iron Complexes, Fe(CO) 3 LL‘. Crystal Structure of trans -Fe(CO) 3 (PEt 3 )(PPh 3 ) by Keiter, Richard L., Benson, John William, Keiter, Ellen A., Harris, Travis A., Hayner, Matthew W., Mosimann, Laura L., Karch, Eric E., Boecker, Carol A., Olson, Donna M., VanderVeen, Jennaver, Brandt, Douglas E., Rheingold, Arnold L., Yap, Glenn P. A.

Get full text