Zobrazeno 1 - 10
of 39
pro vyhledávání: '"K. SUKUMAR VARMA"'
Autor:
Peter N. Horton, Michael A. Beckett, James L. Timmis, Michael B. Hursthouse, K. Sukumar Varma
Publikováno v:
Inorganica Chimica Acta. 383:199-203
[Ph4P][B5O6(OH)(4)]center dot 1.5H(2)O (1) was obtained as colourless crystals in high yield from a MeOH/H2O solution of B(OH)(3) and [PPh4][OH] (5:1). A single-crystal X-ray study confirmed that the solid-state structure was comprised of supramolecu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30444e2b7173d91d62da55aff91b097c
https://doi.org/10.1016/j.ica.2011.11.001
https://doi.org/10.1016/j.ica.2011.11.001
Autor:
Michael A. Beckett, K. Sukumar Varma, James L. Timmis, Peter N. Horton, Michael B. Hursthouse
Publikováno v:
Collection of Czechoslovak Chemical Communications. 75:971-980
[C6H5CH2NH3][B5O6(OH)4] was obtained as colourless crystals in high yield from a MeOH/ H2O (1:1) solution of benzylamine and boric acid (1:5). A single-crystal X-ray study confirmed that the solid-state structure was comprised of a supramolecular H-b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d76217ad6e92605f9fa5adae9ee18cf
https://doi.org/10.1135/cccc2010046
https://doi.org/10.1135/cccc2010046
Publikováno v:
Polyhedron. 27:2226-2230
The interaction of B(OH) 3 with [R 3 N{CH 2 CH(OH)CH 2 OH}] [OH] (R 3 = Me 3 , Me 2 Et, MeEt 2 , Me 2 Bz, Me 2 {CH 2 CH 2 OH}) in a 1:2, 1:1, and 5:1 ratio in aqueous solution has been studied by 11 B NMR spectroscopy and the equilibrium species pres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ffccecf302b23120368ffe7c46b142b
https://doi.org/10.1016/j.poly.2008.04.007
https://doi.org/10.1016/j.poly.2008.04.007
Autor:
Catherine C. Bland, Michael A. Beckett, K. Sukumar Varma, Peter N. Horton, Michael B. Hursthouse
Publikováno v:
Journal of Organometallic Chemistry. 692:2832-2838
The solid-state structures of two non-metal pentaborates [Me3NCH2CH2OH][B5O6(OH)4] (1) and [4-MepyH, 4-Mepy][B5O6(OH)4] (2) have been determined by single-crystal X-ray diffraction methods. Structures 1 and 2 both contain supramolecular pentaborate f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84533875fafa90dfe82a13c4b39aa222
https://doi.org/10.1016/j.jorganchem.2007.02.038
https://doi.org/10.1016/j.jorganchem.2007.02.038
Publikováno v:
Journal of Sol-Gel Science and Technology. 39:95-101
The reaction of metaborate esters (RO)3B3O3 [R = Me, Et, ClCH2CH2–, Cl3CCH2–, ClCH2CH2CH2–, (ClCH2)2CH–] with Si(OR)4 (R = Me, Et), either neat or in dry propan-2-one or dry THF at room temperature, led to gels which when dried and heated in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9aa6dd64909114deb472be81bd5f66eb
https://doi.org/10.1007/s10971-006-8972-8
https://doi.org/10.1007/s10971-006-8972-8
Publikováno v:
Polyhedron. 22:3333-3337
Low temperature reactions of dilute solutions of 1,5-dichloro-1,1,3,3,5,5-hexamethyltrisiloxane with boronic acids {RB(OH) 2 ; R= n Bu, C 6 H 4 Me-2, C 6 H 4 Me-3, C 6 H 4 Me-4, C 6 H 4 OMe-3, C 6 H 4 OMe-4, C 6 H 4 Br-2, C 6 H 4 Br-3, C 6 H 4 Br-4}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0a2695c7c7d050b92feff8c13876d60
https://doi.org/10.1016/s0277-5387(03)00478-9
https://doi.org/10.1016/s0277-5387(03)00478-9
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 169:113-116
The Lewis acidities of a series of haloalkyl orthoborate and metaborate esters have been determined by Gutmann's 31P NMR method. The introduction of halogens into the alkyl group of the borate generally increases the Lewis acidity at boron. Detailed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ce03916d50b09929ac5136536fb8450
https://doi.org/10.1080/10426500108546603
https://doi.org/10.1080/10426500108546603
Autor:
K.M. Abdul Malik, David E. Hibbs, K. Sukumar Varma, Paul Owen, Michael A. Beckett, Michael B. Hursthouse
Publikováno v:
Journal of Organometallic Chemistry. 595:241-247
The new cyclo-diboratetrasiloxanes (RBO)2(R′2SiO)2 (R=p-BrC6H4, o-MeC6H4, m-NH2C6H4, m-NO2C6H4, Bun; R′2=Ph2, R=Ph, p-BrC6H4, m-NO2C6H4; R′2=octn/Me) and cyclo-boratrisiloxanes (RBO)(R′2SiO)2 (R=p-BrC6H4, m-NH2C6H4; R′2=Me2, Ph/Me) were pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cba9008d638518cefe55487af32fc8f1
https://doi.org/10.1016/s0022-328x(99)00631-2
https://doi.org/10.1016/s0022-328x(99)00631-2
Publikováno v:
Journal of Organometallic Chemistry. 588:107-112
The synthesis of 30 new triorganosilyl and triorganostannyl esters of orthoboric, metaboric, and arylboronic acids are described: (R3SiO)3B {R3=nBuMe2, PhMe2, [2-(3-cyclohexenyl)ethyl]Me2, (nOctadecyl)Me2, nHex3}; (R3MO)3B3O3 {M=Si: R3=nPr3, nBu3, nH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e2d60a775631cb5fb474a2d5482846b
https://doi.org/10.1016/s0022-328x(99)00352-6
https://doi.org/10.1016/s0022-328x(99)00352-6
Autor:
Paul Owen, K. M. Abdul Malik, David S. Brassington, Michael A. Beckett, Michael B. Hursthouse, Mark E. Light, K. Sukumar Varma
Publikováno v:
Journal of Organometallic Chemistry. 585:7-11
The synthesis and characterisation (m.p., elemental analysis, IR, NMR) of some previously unreported Me3B3O3. L adducts (L=piperidine, isobutylamine, morpholine, 3-picoline, benzylamine) are described. The crystal and molecular structure of (Me3B3O3N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91e9cd527be020346f404f435ca00afc
https://doi.org/10.1016/s0022-328x(99)00182-5
https://doi.org/10.1016/s0022-328x(99)00182-5