Zobrazeno 1 - 10 of 430 pro vyhledávání: '"Reed, CA"'
1
Evidence for C-H hydrogen bonding in salts of tert-butyl cation
Autor: Stoyanov, ES, Stoyanova, IV, Tham, FS, Reed, CA
Publikováno v: Angewandte Chemie (International ed. in English), vol 51, iss 36
Stoyanov, ES; Stoyanova, IV; Tham, FS; & Reed, CA. (2012). Evidence for C-H hydrogen bonding in salts of tert-butyl cation. Angewandte Chemie-International Edition, 51(36), 9149-9151. doi: 10.1002/anie.201203958. UC Riverside: Retrieved from: http://www.escholarship.org/uc/item/7g54z6ct
Environmentally sensitive: A combination of C-H⋯·anion hydrogen bonding and hyperconjugative charge delocalization explains the sensitivity of the IR spectrum of the tert-butyl cation to its anion (see high-resolution X-ray structure with a CHB11C
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2
Triethylsilyl perfluoro-tetraphenylborate, [Et3Si+][F20-BPh4-], a widely used nonexistent compound
Autor: Nava, M, Reed, CA
Publikováno v: Nava, M; & Reed, CA. (2011). Triethylsilyl perfluoro-tetraphenylborate, [Et3Si+][F20-BPh4-], a widely used nonexistent compound. Organometallics, 30(17), 4798-4800. doi: 10.1021/om200636u. UC Riverside: Retrieved from: http://www.escholarship.org/uc/item/12h0652w
The commonly used triethylsilyl perfluoro-tetraphenylborate salt, [Et3Si+][F20-BPh4-], has been misidentified. As prepared, the cation is a hydride-bridged silane adduct [R3Si-H-SiR3+]. Under favorable circumstances it can be an effective source of t
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3
The unique nature of H + in water
Autor: Stoyanov, ES, Stoyanova, IV, Reed, CA
Publikováno v: Chemical Science, vol 2, iss 3
The H+(aq) ion in ionized strong aqueous acids is an unexpectedly unique H13O6+ entity, unlike those in gas phase H+(H2O)n clusters or typical crystalline acid hydrates. IR spectroscopy indicates that the core structure has neither C3v H3O+ Eigen-lik
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https://escholarship.org/uc/item/6sk610vn
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5
R3E+ carborane salts of the heavier group 14 elements: E = Ge, Sn, and Pb
Autor: Wright, JH, Mueck, GW, Tham, FS, Reed, CA
Publikováno v: Wright, JH; Mueck, GW; Tham, FS; & Reed, CA. (2010). R3E+ carborane salts of the heavier group 14 elements: E = Ge, Sn, and Pb. Organometallics, 29(18), 4066-4070. doi: 10.1021/om100662r. UC Riverside: Retrieved from: http://www.escholarship.org/uc/item/8z2984bm
The synthetic and structural chemistry of catalytically useful trialkylsilylium salts with weakly coordinating carborane anions, R 3Si(CHB11X11), has been extended to the heavier group 14 elements. Et3Ge(CHB11H5Br 5) was prepared from Et3GeH and trit
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6
High yield C-derivatization of weakly coordinating carborane anions
Autor: Nava, MJ, Reed, CA
Publikováno v: Inorganic chemistry, vol 49, iss 11
Nava, MJ; & Reed, CA. (2010). High yield C-derivatization of weakly coordinating carborane anions. Inorganic Chemistry, 49(11), 4726-4728. doi: 10.1021/ic100053u. UC Riverside: Retrieved from: http://www.escholarship.org/uc/item/47c5n0dd
Unlike the parent carborane anion CHB11H11-, halogenated carborane anions such as CHB11H 5Br6- can be readily C-functionalized in high yield and purity, enhancing their utility as weakly coordinating anions. © 2010 American Chemical Society.
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7
H+, CH3+, and R3Si+carborane reagents: When triflates fail
Autor: Reed, CA
Publikováno v: Reed, CA. (2010). H+, CH3+, and R3Si+carborane reagents: When triflates fail. Accounts of Chemical Research, 43(1), 121-128. doi: 10.1021/ar900159e. UC Riverside: Retrieved from: http://www.escholarship.org/uc/item/1dh1747h
(Figure Presented) For decades, triflic acid, methyl triflate, and trialkylsilyl triflate reagents have served synthetic chemistry well as clean, strong electrophilic sources of H+, CH3+, and R3Si+, respectively. However, a number of weakly basic sub
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8
Synthesis and crystal structure of a silyl-stabilized ally1 cation formed by disruption of an arene by a protonation-hydrosilylation sequence
Autor: Duttwyler, S, Zhang, Y, Linden, A, Reed, CA, Baldridge, KK, Siegel, JS
Publikováno v: Duttwyler, S; Zhang, Y; Linden, A; Reed, CA; Baldridge, KK; & Siegel, JS. (2009). Synthesis and crystal structure of a silyl-stabilized ally1 cation formed by disruption of an arene by a protonation-hydrosilylation sequence. Angewandte Chemie-International Edition, 48(21), 3787-3790. doi: 10.1002/anie.200900098. UC Riverside: Retrieved from: http://www.escholarship.org/uc/item/07x548vk
Sly silyl caught in the act: Protonation of a mesitylene ring by the strongly acidic arenium carborane [CH3C6H6]- [CHB11Me5Br6] initiates a cascade reaction that results in a stable β-silyl allyl cation (see picture, H yellow, C blue, silyl allyl gr
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9
Superacidity of boron acids H2(B12X12)(X = Cl, Br)
Autor: Avelar, A, Tham, FS, Reed, CA
Publikováno v: Avelar, A; Tham, FS; & Reed, CA. (2009). Superacidity of boron acids H2(B12X12)(X = Cl, Br). Angewandte Chemie-International Edition, 48(19), 3491-3493. doi: 10.1002/anie.200900214. UC Riverside: Retrieved from: http://www.escholarship.org/uc/item/0vh8x74t
Acid remarks: The anhydrous diprotic boron acids H2(B 12X12) (X=Cl, Br; see picture, B orange, X green) are the first examples of diprotic superacids and may be the strongest acids yet isolated. Both protons protonate benzene to give benzenium ion sa
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10
The basicity of unsaturated hydrocarbons as probed by hydrogen-bond- acceptor ability: Bifurcated N-H+⋯μ hydrogen bonding
Autor: Stoyanov, ES, Stoyanova, IV, Reed, CA
Publikováno v: Stoyanov, ES; Stoyanova, IV; & Reed, CA. (2008). The basicity of unsaturated hydrocarbons as probed by hydrogen-bond-acceptor ability: Bifurcated N-H+⋯μ hydrogen bonding. Chemistry-A European Journal, 14(26), 7880-7891. doi: 10.1002/chem.200800337. UC Riverside: Retrieved from: http://www.escholarship.org/uc/item/57g48370
The competitive substitution of the anion (A-) in contact ion pairs of the type [Oct3NH+]B(C6F5V by unsaturated hydrocarbons (L) in accordance with the equilibrium Oct 3NH+ ⋯A- + nL ⇄ [Oct 3NH+-Ln]A- has been studied in CCl4. On the basis of equi
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