372 research outputs found
Chromium(III) and chromium(IV) bis(trimethylsilyl) amido complexes as ethylene polymerisation catalysts
No full textOxidation of Cr[N(SiMe3)(2)](2)(THF)(2) with iodine and dicumyl peroxide results in tetrahedral Cr(IV)Cr[N(SiMe3)(2)](2)I-2 and trigonal planar Cr(III) Cr[N(SiMe3)(2)](OCMe2Ph)(2), respectively; both complexes have been characterised by single-crystal X-ray diffraction, and both are active for ethylene polymerisation with alkylaluminium co-catalysts.PT: J; CR: AJJOU JAN, 1997, ORGANOMETALLICS, V16, P86 AJJOU JAN, 2000, J AM CHEM SOC, V122, P8968 ALONSO PJ, 2002, CHEM-EUR J, V8, P4056 BASI JS, 1971, J CHEM SOC A, P1433 BEAUDOIN MC, 2002, J MOL CATAL A-CHEM, V190, P159 BERNO P, 1994, ORGANOMETALLICS, V13, P1052 BLANCHARD H, 1988, J ORGANOMET CHEM, V341, P367 BOCHMANN M, 1980, J CHEM SOC DA, P1863 BRADLEY DC, 1972, J CHEM SOC CHEM COMM, P567 BRADLEY DC, 1976, ACCOUNTS CHEM RES, V9, P273 BRADLEY DC, 1978, INORG SYNTH, V18, P112 BRITOVSEK GJP, 1999, ANGEW CHEM INT EDIT, V38, P428 BURGER H, 1964, MONATSH, V95, P1099 CUMMINS CC, 1992, ANGEW CHEM INT EDIT, V31, P1501 CUMMINS CC, 1998, PROG INORG CHEM, V47, P685 DRYKACZ G, 1973, J AM CHEM SOC, V95, P4756 ELLER PG, 1977, COORDIN CHEM REV, V24, P1 FILIPPOU AC, 2002, EUR J INORG CHEM NOV, P2928 FILIPPOU AC, 2003, ANGEW CHEM INT EDIT, V42, P4486 FILIPPOU AC, 2003, ORGANOMETALLICS, V22, P3010 FIRMAN TK, 2001, J ORGANOMET CHEM, V635, P153 FRYZUK MD, 1995, ORGANOMETALLICS, V14, P5193 GIBSON VC, 1998, CHEM COMMUN 0821, P1651 GIBSON VC, 1999, J CHEM SOC DALT 0321, P827 GIBSON VC, 2000, J CHEM SOC DALTON, P1969 GIBSON VC, 2001, EUR J INORG CHEM JUL, P1895 GIBSON VC, 2002, J CHEM SOC DALTON, P4017 GIBSON VC, 2003, CHEM REV, V103, P283 HAGIHARA N, 1959, J AM CHEM SOC, V81, P3160 IKEDA H, 2001, MACROMOL CHEM PHYSIC, V202, P1806 IKEDA H, 2002, J ORGANOMET CHEM, V642, P156 KAYAL A, 2002, INORG CHEM, V41, P321 LAPLAZA CE, 1996, J AM CHEM SOC, V118, P8623 MESSERE R, 2000, EUR J INORG CHEM JUN, P1151 MINDIOLA DJ, 1998, ANGEW CHEM INT EDIT, V37, P945 MOWAT W, 1972, J CHEM SOC DA, P533 MOWAT W, 1973, J CHEM SOC DA, P770 ROBERTSON NJ, 2003, INORG CHEM, V42, P6876 SCHMID R, 2000, CAN J CHEM, V78, P265 SCHMID R, 2000, ORGANOMETALLICS, V19, P2756 SCHNEIDER S, 2001, INORG CHEM, V40, P4674 SCHULZKE C, 2002, ORGANOMETALLICS, V21, P3810 SCOTT SL, 2001, CHEM ENG SCI, V56, P4155 SEIDEL W, 1976, Z ANORG ALLG CHEM, V426, P150 SEIDEL W, 1976, Z ANORG ALLG CHEM, V426, P155 SMALL BL, 2004, MACROMOLECULES, V37, P4375 THEOPOLD KH, 1998, EUR J INORG CHEM JAN, P15 VANRENSBURG WJ, 2004, ORGANOMETALLICS, V23, P1207; NR: 48; TC: 3; J9: DALTON TRANS; PG: 3; GA: 865WTSource type: Electronic(1
Layered V-B-O polyoxometalate nets linked by diethylenetriamine complexes with dangling amine groups
No full textTwo layered V-B-O contained polyoxometalate (POM) net structures, denoted as SUT-12 and SUT-13, are reported here. SUT-12 was synthesized by the boric acid flux method, and it represents the first 2D structure constructed from the V6B20 vanadoborate cluster. SUT-13 was synthesized by the hydrothermal method and constructed from V12B6P12 vanadium borophosphate clusters. In both structures, the vanadoborate or vanadium borophosphate clusters were linked through in situ formed Zn(DETA)(2) or Cu(DETA)(2) complexes. Surprisingly, for all DETA molecules in the two metal complexes, there is one dangling amine group when it is coordinated to the metal. The phenomenon of the dangling amine group feature is abnormal and the Cu(DETA)(2) complexes in SUT-13 were taken as an example and studied by the density functional theory (DFT) calculations in order to understand this unusual feature.Chemistry, Inorganic & NuclearSCI(E)[email protected]; [email protected]
A ruthenium water oxidation catalyst based on a carboxamide ligand
No full textHerein is presented a single-site Ru complex bearing a carboxamide-based ligand that efficiently manages to carry out the fourelectron oxidation of H2O. The incorporation of the negatively charged ligand framework significantly lowered the redox potentials of the Ru complex, allowing H2O oxidation to be driven by the mild oxidant [Ru(bpy)(3)](3+). This work highlights that the inclusion of amide moieties into metal complexes thus offers access to highly active H2O oxidation catalysts.Swedish Research Council [621-2013-4872, 348-2014-6070]; Knut and Alice Wallenberg Foundation; Carl Trygger FoundationSCI(E)[email protected]; [email protected]; [email protected]; [email protected]
Pat Jessen, Les Dalton and Henry Rosenbloom at launch of Les Dalton's book "Radiation Exposures", 20 May 1991.
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/276353Pat Jessen, Les Dalton and Henry Rosenbloom (publisher, Scribe Publications) at launch of Les Dalton's book "Radiation Exposures", 20 May 1991. "Les Dalton was born in 1919 in Sydney. He started work in 1933 in a small family business that had pioneered the manufacture of plastics in Australia early in the century. He qualified in industrial chemistry at the old Sydney Technical College in 1939, and in 1941 joined the CSIRO in Melbourne to work on plastics used in warplanes. Later his research interests turned to organic synthesis for cancer drugs and plant chemicals. In 1976 Dalton retired early, as a principal research scientist at CSIRO's division of organic chemistry, to pursue his interests in environmental issues. He has made submissions to public and parliamentary inquiries on the health problems of power lines, and on the mining of uranium and mineral sands. Les Dalton is the author of The Nuclear Environment (1983). He and his wife Dorothy live in Melbourne. They have two sons and two grandchildren." (Taken from Radiation Exposures, published by Scribe Publications.)200896
Item: [1999.0081.00402] "Pat Jessen, Les Dalton and Henry Rosenbloom at launch of Les Dalton's book "Radiation Exposures", 20 May 1991.
Kinetics of peroxodisulfate oxidation of low-spin iron(ii) complexes in binary aqueous mixtures
No full textPT: J; CR: ABRAHAM MH, 1969, CHEM COMMUN, P1307 ABRAHAM MH, 1969, CHEM COMMUN, P930 ABRAHAM MH, 1971, J CHEM SOC A, P1061 ADAMS DM, 1965, ADV PRACTICAL INORGA, P122 BALL DL, 1960, J ORG CHEM, V25, P1599 BLANDAMER MJ, 1976, J CHEM SOC DA, P1158 BLANDAMER MJ, 1976, J CHEM SOC DA, P606 BLANDAMER MJ, 1977, J CHEM SOC DA, P165 BLANDAMER MJ, 1977, J CHEM SOC DA, P60 BLANDAMER MJ, 1978, J CHEM SOC DA, P1001 BLANDAMER MJ, 1979, J INORG NUCL CHEM, V41, P258 BURGESS J, UNPUBLISHED BURGESS J, 1965, J CHEM SOC, P6061 BURGESS J, 1966, J CHEM SOC A, P1772 BURGESS J, 1968, J CHEM SOC A, P1085 BURGESS J, 1969, J CHEM SOC A, P1899 BURGESS J, 1970, J CHEM SOC A, P2111 BURGESS J, 1970, J CHEM SOC A, P2114 BURGESS J, 1970, J CHEM SOC A, P2351 CARRONDO MAA, 1977, J CHEM SOC DA, P2323 COOKSON PG, 1976, J CHEM SOC CHEM COMM, P1022 COX BG, 1979, JCS F1, P1780 DICKENS JE, 1957, J AM CHEM SOC, V79, P1286 GARDNER ER, 1964, INT J CHEM KINETICS, V6, P133 GILLARD RD, 1975, COORDIN CHEM REV, V16, P67 GORDON AJ, 1972, CHEM COMPANION HDB P GREEN AA, 1966, INORG CHEM, V5, P1858 HAINES RI, 1977, THESIS U LEICESTER HALPERN J, 1963, J AM CHEM SOC, V85, P680 HOUSE DA, 1962, CHEM REV, V62, P185 IRVINE DH, 1959, J CHEM SOC, P2977 JACKMAN FA, 1976, J SOLUTION CHEM, V5, P417 JINDAL VK, 1970, Z NATURFORSCH B, V25, P188 KAPOOR S, 1977, J INORG NUCL CHEM, V39, P1019 KOLTHOFF IM, 1953, J AM CHEM SOC, V75, P1439 KULIEV AM, 1976, KINETICA KATALIZ, V17, P1428 MOSS ML, 1942, IND ENG CHEM ANAL ED, V14, P931 OHASHI K, 1976, B CHEM SOC JPN, V49, P2440 RAMAN S, 1969, J INORG NUCL CHEM, V31, P1091 SAIPRAKASH PK, 1976, J INORG NUCL CHEM, V38, P880 SHAKHASHIRI BZ, 1969, J AM CHEM SOC, V91, P1103 SOROKINA MF, 1976, RUSS J PHYS CHEM, V50, P915 STALNAKER ND, 1977, J PHYS CHEM-US, V81, P601 SULFAB Y, 1977, INORG CHIM ACTA, V22, P35 TURNEY TA, 1965, OXIDATION MECHANISMS, P147 VANMETER FM, 1976, J AM CHEM SOC, V98, P1382; NR: 46; TC: 20; J9: J CHEM SOC DALTON TRANS; PG: 5; GA: KU279Source type: Electronic(1
Structure and dynamics of solid tris (Trimethylsilyl) Amine by deuterium nuclear magnetic resonance spectroscopy
No full textDeuterium NMR spectra for solid [H-2(9)]tris(trimethylsilyl)amine were recorded at 77 K and in the region 114-353 K. At 77 K there is only fast rotation of the methyl groups. Between 122 and 171 K rotation of the trimethylsilyl groups and of the entire molecule (about its C3 axis) affect the deuterium N M R line shape. Above 180 K both motions are fast ( > 10(5) Hz). There is a phase transition at 227 +/- 2 K. Above 227 K the molecule undergoes a fast precessional motion of increasing effective amplitude until the melting point (343 K). The only dynamic model capable of explaining the spectra at temperatures above 180 K requires the three N-Si bonds to be coplanar.PT: J; CR: ANDERSON DG, 1989, J CHEM SOC DA, P779 ANDERSON DG, 1990, J CHEM SOC DA, P161 BARLOS K, 1978, J MAGN RESON, V31, P363 BLAKE AJ, 1986, J CHEM SOC DA, P91 DAVIS JH, 1976, CHEM PHYS LETT, V42, P390 DAVIS JH, 1991, ISOTOPES PHYSICAL BI, V2, CH2 EBSWORTH EAV, 1987, ACCOUNTS CHEM RES, V20, P295 GRIFFIN RG, 1981, METHOD ENZYMOL, V72, P108 GRUWEL MLH, 1990, Z NATURFORSCH A, V45, P55 GUNDERSEN G, 1984, ACTA CHEM SCAND A, V38, P579 HEYES SJ, 1990, MAGN RESONANCE CHEM, V28, P537 KORFER M, 1989, Z NATURFORSCH A, V44, P1177 LEVY H, 1967, J INORG NUCL CHEM, V29, P1859 LIVANT P, 1983, INORG CHEM, V22, P895 RANKIN DWH, 1969, J CHEM SOC A, P1224 RANKIN DWH, 1987, J CHEM SOC DA, P785 SPIESS HW, 1985, ADV POLYM SCI, V66, P233 WANNAGAT U, 1959, ANGEW CHEM, V71, P574 WRACKMEYER B, 1990, MAGN RESON CHEM, V28, P1066; NR: 19; TC: 1; J9: J CHEM SOC DALTON TRANS; PG: 4; GA: KQ743Source type: Electronic(1
Initial state and transition-state effects in the mercury(ii)-catalysed aquation of chlorotransition-metal complexes in binary aqueous solvent mixtures
No full textPT: J; CR: ABRAHAM MH, 1969, CHEM COMMUN, P1307 ABRAHAM MH, 1969, CHEM COMMUN, P930 ABRAHAM MH, 1971, J CHEM SOC A, P1061 ABRAHAM MH, 1973, J CHEM SOC F1, V69, P1375 ARNETT EM, 1965, J AM CHEM SOC, V87, P2048 BAILAR JC, 1946, INORG SYN, V2, P222 BAX D, 1972, RECL TRAV CHIM PAY B, V91, P965 BERTRAND GL, 1976, J AM CHEMICAL SOC, V98, P7944 BLANDAMER MJ, 1976, J CHEM SOC DA, P1158 BLANDAMER MJ, 1976, J CHEM SOC DA, P1293 BLANDAMER MJ, 1976, J CHEM SOC DA, P385 BLANDAMER MJ, 1976, J CHEM SOC DA, P606 BLANDAMER MJ, 1977, J CHEM SOC DA, P165 BLANDAMER MJ, 1977, J CHEM SOC DA, P60 BLANDAMER MJ, 1977, J CHEM SOC DA, P63 BURGES J, 1976, J CHEM SOC DA, P1561 BURGESS J, UNPUBLISHED BURGESS J, 1971, INORGANIC REACTION M, V1, P112 BURGESS J, 1972, INORGANIC REACTION M, V2, P111 BURGESS J, 1973, J CHEM SOC DA, P902 BURGESS J, 1974, INORGANIC REACTION M, V3, P322 BURGESS J, 1977, J CHEM SOC DA, P1775 BURGESS J, 1978, METAL IONS SOLUTION, CH9 CHAN SF, 1976, J INORG NUCL CHEM, V38, P2161 COLTON R, 1965, CHEM RHENIUM TECHNET, P76 COX BG, COMMUNICATION COX BG, 1974, ANN REP CHEM SOC A, P249 COX BG, 1974, AUST J CHEM, V27, P477 DASH AC, 1975, J CHEM SOC DA, P897 DASH AC, 1977, TRANSIT METAL CHEM, V2, P183 DASH AC, 1978, J INORG NUCL CHEM, V40, P132 DAWSON BS, 1977, INORG CHEM, V16, P1354 FITZGERALD WR, 1968, J AM CHEM SOC, V90, P5744 FOONG SW, 1971, J CHEM SOC A, P118 GORDON AJ, 1972, CHEM COMPANION, P429 GOSWAMI L, 1977, Z ANORG ALLG CHEM, V435, P301 GRUNWALD E, 1948, J AM CHEM SOC, V70, P846 GRUNWALD E, 1974, J AM CHEM SOC, V96, P423 INGOLD CK, 1953, STRUCTURE MECH ORGAN, P345 ISE N, 1976, J POLYM SCI POL LETT, V14, P667 KELM H, 1969, Z PHYS CHEM, V67, P98 KUMARI K, 1977, CHEM ABSTR 29623J, V87 LALOR GC, 1978, J INORG NUCL CHEM, V40, P305 LEFFLER JE, 1963, RATES EQUILIBRIA ORG MAYER U, 1975, PURE APPL CHEM, V41, P291 MCAULEY A, 1976, INORGANIC REACTION M, V4, P242 PEARSON RG, 1973, HARD SOFT ACIDS BASE SCHLESSINGER GG, 1967, INORG SYNTH, V9, P160 STRELTSOVA EM, 1973, IZVEST VYSSH UCHEBN, V16, P694 STRELTSOVA EM, 1974, RUSS J ORG CHEM+, V48, P992 STRELTSOVA EM, 1974, RUSS J PHYS CHEM, V48, P2244 STRELTSOVA EM, 1976, RUSS J PHYS CHEM, V50, P264 SZE YK, 1975, CAN J CHEM, V53, P427 VANMETER FM, 1976, J AM CHEM SOC, V98, P1382 WELLS CF, 1973, JCS F1, P984 WELLS PR, 1963, CHEM REV, V63, P171 WELLS PR, 1968, LINEAR FREE ENERGY R, CH4; NR: 57; TC: 38; J9: J CHEM SOC DALTON TRANS; PG: 9; GA: JN546Source type: Electronic(1
Observations of an Intern : The Costume Shop, The Milwaukee Repertory Theatre
No full textiii, 11 p., supplemental materialThe author describes her work on historical and modern costumes for five different shows during her internship.Milwaukee Repertory Theatre. Milwaukee, Wisconsin
Mechanistic Investigations into the Palladium-Catalyzed Decarboxylative Allylic Alkylation of Ketone Enolates Using the PHOX Ligand Architecture
No full textPalladium-catalyzed asymmetric allylic alkylation has become a large and important field for chemical synthesis. Many methodologies in this field offer mild conditions under which challenging and important molecular features can be reliably synthesized, including chiral all-carbon quaternary stereocenters. As a result, palladium- catalyzed asymmetric allylic alkylation has found significant use in total synthesis, and growing use in industry. While the general process of palladium-catalyzed asymmetric allylic alkylation has been studied for decades, there have been a number of recent modifications and developments, such as asymmetric versions of decarboxylative allylic alkylation procedures that are not yet well understood. The development of future implementations and improvements to palladium-catalyzed asymmetric allylic alkylation and related methodologies is expected to be facilitated by a better understanding of these more recent developments, and thus further mechanistic investigation is warranted.
Reported herein is a set of investigations into the palladium-catalyzed decarboxylative asymmetric allylic alkylation of ketone enolates using the PHOX ligand architecture. By monitoring the reaction via 31P NMR, a series of previously unidentified key intermediates is discovered. Two representatives of these key intermediates are isolated and characterized. The solution behavior of these species under reaction-like conditions is studied along with a few novel and related complexes. The role of these intermediates and their impact on the behavior of the reaction and product formation is discussed. Previously confounding experimentally observed behavior for this methodology is rationalized via the properties elucidated for these discovered intermediates.</p
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