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Palladium Catalyzed Coupling Reactions: Mechanism of Reductive Elimination. Progress Report, October 1, 1979-September 30, 1980. [Ethane Elimination]
The 1,1-reductive elimination of ethane from three cis-bis(phosphine)-dimethylpalladium complexes, L/sub 2/Pd(CH/sub 3/)/sub 2/ (L = PPh/sub 3/, PPh/sub 2/,CH/sub 3/ and L/sub 2/ = Ph/sub 2/PCH/sub 2/CH/sub 2/PPh/sub 2/), and three trans analogs (L = PPh/sub 3/, PPh/sub 2/CH/sub 3/ and L/sub 2/ = 2,11-bis(diphenylphosphinomethyl)benzo(c)phenanthrene (TRANSPHOS)) was carried out. The three cis complexes underwent reductive elimination in the presence of coordinating solvents (DMSO, DMF, and THF). The trans complexes which could isomerize to cis (L = PPh/sub 3/, PPh/sub 2/CH/sub 3/) did so in polar solvents and then underwent reductive elimination. TRANSPHOS dimethylpalladium would not undergo reductive elimination of ethane. The eliminations from the cis isomers were intramolecular and displayed first order kinetics. Although TRANSPHOS dimethylpalladium(II) would not undergo a 1,1-reductive elimination of ethane, the addition of CD/sub 3/I to a DMSO solution of this complex at 25/sup 0/C rapidly produced CD/sub 3/-CH/sub 3/, implicating a transient palladium(IV) intermediate. E- and Z-bromostyrylbis(diphenylmethylphosphine)palladium(0) react with methyl lithium in THF at ambient temperature to give the E- and Z- propenylbenzenes, respectively. At -78/sup 0/C, the intermediate E- and Z-styrylmethylbis(diphenylmethylphosphine)palladium(II) complexes (9a,b) can be isolated. On raising the temperature of solutions of 9a,b in THF, E- and Z-propenylbenzenes are produced. The reductive elimination …
Date:
September 1, 1980
Creator:
Stille, J. K.
Object Type:
Report
System:
The UNT Digital Library
Site selection and preliminary evaluation of potential solar-industrial-process-heat applications for federal buildings in Texas
The potential for solr process heat applications for federal buildings in Texas is assessed. The three sites considered are Reese Air Force Base, Lubbock; Fort Bliss, El Paso; and Dyess Air Force Base, Abilene. The application at Lubbock is an electroplating and descaling facility for aircraft maintenance. The one at El Paso is a laundry facility. The Abilene system would use solar heat to preheat boiler feedwater makeup for the base hospital boiler plant. The Lubbock site is found to be the most appropriate one for a demonstration plant, with the Abilene site as an alternate. The processes at each site are described. A preliminary evaluation of the potential contribution by solar energy to the electroplating facility at Reese AFB is included. (LEW)
Date:
September 30, 1980
Creator:
Branz, Michael A.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0052.1019]
Photograph taken for a story in the Oklahoma City Times newspaper. Caption: "These seats were damaged by heavy i-beams that rammed the school bus."
Date:
September 5, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0110.0203]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "David Brown, Harzfeld's Fashion Week guest, shows off one of his creations."
Date:
September 16, 1980
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0106.0009]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Decaying bridge on Chisholm Creek, on Western Ave, south of NW 206th Okla. City."
Date:
September 25, 1980
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0104.0302]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Candelabrum, snuffer, tea set, dinner bell, graceful birds are dine in brass."
Date:
September 23, 1980
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0093]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
September 16, 1980
Creator:
Grier, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0126]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Sharon Clark and Lawyer Tommy Frasier."
Date:
September 5, 1980
Creator:
Longstreath, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0147.0474]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Visitors to the State Fair of Oklahoma have a chance to try to win their spurs by clinging to a mechanical bucking machine, the current rage among country-western fans around the nation."
Date:
September 22, 1980
Creator:
Longstreath, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0620]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
September 11, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0022]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mrs. Albert Clester of Okeene displays her prize-winning tea ring pastry at the State Fair of Oklahoma on Sunday."
Date:
September 21, 1980
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0084]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The victorious Democratic Senate nominee, Andy Coats, greets supporters."
Date:
September 16, 1980
Creator:
Grier, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0089]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
September 16, 1980
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0150.0369]
Photograph used for a story in the Oklahoma Times newspaper.
Date:
September 25, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0787]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
September 15, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0704]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Guy Coheleach explains the steps he goes through when painting a mallard duck like those pictured at rught."
Date:
September 15, 1980
Creator:
Buehner, Jeff
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0149.0092]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The wreckage of a crop-dusting plane lies in a cotton field near Altus after a crash Wednesday that reportedly occurred after the plane hit a radio tower."
Date:
September 25, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0162.0572]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "There weren't many good moments for Midwest City Friday night when the No. 1 ranked Bombers were drilled 49-21 by Putnam West at Rose Fled ...."
Date:
September 19, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0155.0383]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Cynthia Dawson shows off her favorite tacky lamp and polyester pants."
Date:
September 6, 1980
Creator:
Longstreath, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0616]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Ed Clark, presidential candidate of the Libertarian Party, calls for repeal of laws prohibiting the sale or use of controlled dugs."
Date:
September 11, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0152]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "With wife Nancy looking on, Democratic U.S. Senate candidate Andy Coats sigs the voter roster Tuesday."
Date:
September 16, 1980
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0156.0104]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Larry Dean entertains an audience Friday at the Oklahoma County Music Associations's 1980 Convention held at the Southgate Inn."
Date:
September 5, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0124]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "BOUND OVER -- Sharon Clark, right, her husband, Leon, pushing wheelchair, and attorney Tommy Fraiser leave the Cherokee County Courthouse Friday after Mrs. Clark was bound over on a second degree murder charge in the July 15 shooting death of Sandi Marie Quinton in Tahlequah before a Little League baseball game."
Date:
September 5, 1980
Creator:
Longstreath, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0721]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
September 19, 1980
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History