Results 131 to 140 of about 7,228 (168)
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Green Chem., 2012
We show here that betaine hydrochloride (BHC), a co-product of the carbohydrate industry, can be used for the design of cheap and safe media capable of promoting the dehydration of fructose and inulin to HMF. In particular, in these BHC-based media, HMF was obtained with up to 84% yield, thus offering a competitive route to the traditional imidazolium ...
Vigier, Karine de Oliveira +3 more
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We show here that betaine hydrochloride (BHC), a co-product of the carbohydrate industry, can be used for the design of cheap and safe media capable of promoting the dehydration of fructose and inulin to HMF. In particular, in these BHC-based media, HMF was obtained with up to 84% yield, thus offering a competitive route to the traditional imidazolium ...
Vigier, Karine de Oliveira +3 more
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Crystal structure of BIS(Betaine) hydrochloride monohydrate
Journal of Molecular Structure, 1990Abstract Bis(betaine) hydrochloride monohydrate, 2Me 3 NCH 2 COO·HCI·H 2 O, crystallizes in space group Pnma (No. 62), with a =11.904(1), b =22.454(5), c =5.624(1) A, and Z =4. The structure has been refined to RinF =0.046 for 863 observed (| F o ||>6σ| F o |) Mo K α data. the carboxylate groups of a pair of betaine molecules are bridged by
Xiao-Ming Chen, Thomas C.W. Mak
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Potentiometric Batch and Flow Injection Analysis of Betaine Hydrochloride
Annali di Chimica, 2007AbstractNovel PVC membrane electrodes for the determination of betaine ion based on the formation of betaine‐tetraphenylborate (Be‐TPB) and betaine‐phosphotungstate (Be‐PT) ion‐exchangers as electroactive materials are described. The sensors show a fast, stable, near Nernstian response for 6.92 × 10‐6 to 7.94 × 10‐3 M and 1.0 × 10‐4 to 1.0 × 10‐2 M ...
Sayed S, Badawy +2 more
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Structure of a new form of betaine hydrochloride
Acta Crystallographica Section C Crystal Structure Communications, 1990C 5 H 12 NO 2 + •Cl − cristallise dans Cm avec a=10,578, b=6,9383, c=5,7052 A, β=111,45 o , Z=2; affinement jusqu'a R I =0,048. Bien que la molecule qui contient une liaison hydrogene O-H...Cl, occupe un site de symetrie m dans (I) et n'ait que la symetrie miroir approchee dans (II), les longueurs et angles de liaison mesures dans les deux formes ...
W. H. Yip, R. J. Wang, T. C. W. Mak
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Crystal structure of bis(pyridine betaine) hydrochloride monohydrate
Journal of Molecular Structure, 1990Abstract Bis(pyridine betaine) hydrochloride monohydrate, 2C5H5NCH2COO·HCl·H2O, crystallizes in space group Pnna (No. 52), with a=15.623(3), b=19.707(3), c=5.069(1) A, and Z=4. The structure has been refined to RF=0.067 for 1207 observed (|F0|>6σ|F0|) MoKα data. The carboxylate groups of a pair of pyridine betaine molecules are bridged by a proton to
Chen Xiao-Ming, Thomas C.W. Mak
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Cocrystals of bis(4-hydroxy-1-methylpiperidine betaine) hydrochloride
Journal of Molecular Structure, 2006Abstract Bis(4-hydroxy-1-methylpiperidine betaine) hydrochloride, [bis(1-carboxymethyl-4-hydroxy-1-methylpiperidinium) hydrochloride, (HO–MPB) 2 HCl], has been prepared from stoichiometric amounts of β-4-hydroxy-1-methylpiperidine betaine hydrochloride with the OH group in an equatorial position and α-4-hydroxy-1-methylpiperidine betaine inner salt ...
Z. Dega-Szafran +3 more
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Chemical investigation ofPluchea lanceolata II. Identity of pluchine with betaine hydrochloride
Experientia, 1968Die Struktur von Pluchin, einer quaternaren Base ausPluchea lanceolata, wurde als die des Betainhydrochlorids aufgeklart. Damit sind auch die mit Pluchin beobachteten biologischen Wirkungen verstandlich.
B, Dasgupta, K, Basu, S, Dasgupta
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Short and symmetrical OHO hydrogen bond in bis(quinuclidine betaine) hydrochloride
Journal of Molecular Structure, 2010Abstract The molecular structure of bis(quinuclidine betaine) hydrochloride, (QNB)2HCl, has been characterized by single crystal X-ray diffraction, infrared spectroscopy and by DFT calculations. The crystals are centrosymmetric, monoclinic, space group C2/c.
Z. Dega-Szafran +2 more
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Irradiated betaine hydrochloride: the free radical, N(CH3)3+
Australian Journal of Chemistry, 1973The e.s.r. parameters for the free radical, N(CH3)3+, trapped in monoclinic single crystals of ?-irradiated betaine hydrochloride, have been investigated. The hyperfine splittings have isotropic values, ANiso = 2.26 mT and Aß-Hiso = 2.79 mT, and the isotropic value of the g-tensor is 2.0039.
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Journal of Structural Chemistry, 2014
The crystal structures of 12-hydroxynorfluorocurarine (vincanidine) isolated from the plant Vinca erecta, its hydrochloride monohydrate, quaternary salts — chloromethylate and iodomethylate, and the quaternary base (zwitterionic betaine) have been studied. The asymmetric centers of the molecules have the 3S, 7R, 15S configuration.
Sh. M. Adizov +3 more
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The crystal structures of 12-hydroxynorfluorocurarine (vincanidine) isolated from the plant Vinca erecta, its hydrochloride monohydrate, quaternary salts — chloromethylate and iodomethylate, and the quaternary base (zwitterionic betaine) have been studied. The asymmetric centers of the molecules have the 3S, 7R, 15S configuration.
Sh. M. Adizov +3 more
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