نتایج جستجو برای: sime

تعداد نتایج: 230  

2012
Daniel A. Everson Brittany A. Jones Daniel J. Weix

A general method is presented for the synthesis of alkylated arenes by the chemoselective combination of two electrophilic carbons. Under the optimized conditions, a variety of aryl and vinyl bromides are reductively coupled with alkyl bromides in high yields. Under similar conditions, activated aryl chlorides can also be coupled with bromoalkanes. The protocols are highly functional-group tole...

Journal: :Dalton transactions 2009
Lewis M Broomfield Joseph A Wright Manfred Bochmann

The reaction of secondary phosphines HPR(2) (R = Ph, Cy) with pyrrole-2-aldehydes gives a new family of 2-phosphorylmethyl-1H-pyrroles as potentially chelating mono-anionic ligands. The reaction with Ti(NMe(2))(4) affords octahedral Ti(NMe(2))(2){NC(4)H(2)(4-R')CH(2)P(O)R(2)}(2) (R' = H, Bu(t)). While the diphenylphosphoryl complexes adopt a configuration with trans-pyrrolato ligands, the dicyc...

Journal: :Dalton transactions 2010
Qiaolin Wu Qing Su Ling Ye Guanghua Li Ying Mu

A number of cyclopentadienyltitanium aryloxide complexes, 1-Ar-2,3,4,5-Me(4)-Cp(2,6-(i)Pr(2)C(6)H(3)O)TiCl(2) (Ar = 4-Me(3)SiPhenyl (5), 4-(i)PrPhenyl (6), 4-MePhenyl (7), 3,5-(CF(3))(2)Phenyl (8)) and (1-Ar-2,3,4,5-Me(4)CpTiCl(2))(2)(OAr'O) (Ar' = 4,4'-(3,3',5,5'-(i)Pr(4)C(6)H(2)-C(6)H(2)), Ar = 4-SiMe(3)Phenyl (9), 4-MePhenyl (10)) were synthesized from the reaction of a corresponding cyclope...

2012
MAZNAH ZAINOL ISMAIL SAHID

Thiram (tetramethylthiuram disulfide) is a fungicide used to control plant pathogenic fungi such as Rhizoctonia spp, Phythium spp. and Fusarium spp. which often infest oil palm seedlings from the prenursery until the main nursery stage. With increasing applications of thiram in oil palm nurseries, it is necessary to investigate the fate of thiram in the nursery environment. The trial was conduc...

2001
B. L. Huff D. H. Liles

AbsThis paper is dedicated to describing the efforts of the Small Integrated Manufacturing Enterprise (SIME) program at The University of Texas at Arlington. The research objective of the program is the development of a set of integration requirements for the generalized small CIE of the future. These requirements will be established using a reference model of "the successful small CIE of the f...

Journal: :Inorganic chemistry 2001
M A Munoz-Hernandez T S Keizer P Wei S Parkin D A Atwood

The convenient five-coordinate starting materials, Salen((t)Bu)AlCl (Salen((t)Bu) = N,N'-alkylene (or arylene) bis (3,5-di-tert-butyl-2-hydroxybenzylideneamine) (1-4) can be used in a wide range of reactions to form five-coordinate aluminum compounds. Herein, these reagents were used to produce new five-coordinate azides, LAlN(3) (L = Salen((t)Bu) (5), Salpen((t)Bu) (6), and Salomphen((t)Bu) (7...

Journal: :Science 1974
C Monge J Whittembury

Eaton et al. (1) stated that "increased, rather than decreased, oxygen affinity is an effective mode of short-term adaptation to markedly reduced environmental oxygen pressures" and pointed out the need to reevaluate the idea that "decreased hemoglobin-oxygen affinity is of adaptive value to humans at high altitudes." We fully agree with these authors and wish to call attention to the fact that...

Journal: :Journal of the American Chemical Society 2009
Brandi M Cossairt Christopher C Cummins

Facile synthetic access to the isolable, thermally robust AsP(3) molecule has allowed for a thorough study of its physical properties and reaction chemistry with a variety of transition-metal and organic fragments. The electronic properties of AsP(3) in comparison with P(4) are revealed by DFT and atoms in molecules (AIM) approaches and are discussed in relation to the observed electrochemical ...

Journal: :Dalton transactions 2008
Polly L Arnold Ian S Edworthy Christopher D Carmichael Alexander J Blake Claire Wilson

Magnesium dications bind strongly to a tridentate anionic dicarbene ligand L = [N{CH(2)CH(2)(CNCHCHNMes)}(2)] forming dinuclear and trinuclear Mg complexes with some particularly short Mg-C bonds. Treatment of the proligand H(4)LCl(3) with three equivalents of methyl magnesium chloride or benzyl magnesium chloride affords Mg(3)(HL)Cl(6) in high yield. A suspension of in thf was heated to 80 deg...

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