13C NMR

AcronymDefinition
13C NMRCarbon-13 Nuclear Magnetic Resonance
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The 13C NMR spectrum (Table-1) of 2 fully supported the 1H-NMR data as it displayed eight signals, which were identified as one methyl (I' 14.9), two methylene (I' 41.1 and 61.8), two methine (I' 130.1 and I' 120.1) and three quaternary carbons (I' 156.2, 138.1 and 137.5), on the basis of DEPT experiments.
2-Bromo-3-nitro-1-phenylethanone: MP:; IR (max, cm-1) KBr disc:; 1H NMR: (CDCl3, 300 MHz): 4.49 (2H,s, CH2), 7.74 (1H, t, J = 7.9), 8.34 (1H, dd, J = 7.9, 1.1), 8.48 (1H, dd, 8.2, 1.1 Hz), 8.82 (1H, t, 1.9Hz); 13C NMR: 30.2, 123.58, 127.94, 130.13, 134.35, 134.99, 148.30, 189.3; Mass 242, 244 [M] (29%), 150, 134, 120.
White solid; yield: 46%; mp 76[degrees]C; [sup.1]H NMR (300 MHz, CD[Cl.sub.3]) [delta] 7.78 (s, 1H), 7.75-7.68 (m, 2H), 7.39 (dd, J = 10.7,4.2 Hz, 2H), 7.31-7.20 (m, 2H), 6.95 (d, J = 8.4 Hz, 2H), 4.65 (s, 1H), 4.60-4.46 (dddd, J = 14.2, 3.6,14.0, 6.8 Hz, 2H), 4.36-4.26 (m, 1H), 3.84 (s, 3H), 3.63-3.53 (ddd J = 9.8,4.9,9.7,5.7 Hz, 2H), 2.04 (s, broad, 1h); 13C NMR (75 MHz, CD[Cl.sub.3]) [delta] 159.6,147.5,135.0,133.5 de C3, 129.6, 129.6, 129.3, 126.9, 126.9, 126.9, 120.4, 114.2, 71.3, 70.8, 69.3, 55.3, 52.9; IR (ATR, [cm.sup.-1]): 3256, 3141, 2958, 2924, 2854, 1360,1249; MS [EI+] m/z (%): 403 [[M].sup.+] (28), 125 [[[C.sub.7][H.sub.6]Cl].sup.+] (100).
Elemental analysis thermal analyses conductivity cyclic voltammetry IR 1H NMR 13C NMR UV-Vis and fluorescence spectroscopy have been used to assess relevant interactions of flavonoids and metal ions the chelation sites the dependence of complex structure on the metal/ligand ratio the capability of flavonoids in binding metal ions etc [14].
Comparison of all the 13C NMR spectra of the bones and collagen is then presented with greater focus on the aliphatic amino acids for analysing any differ- ences present.
[sup.1]H NMR (400 MHz, CD[Cl.sub.3], 25[degrees]C), S (ppm) = 771 (d, 1H, J = 16.0 Hz, =CH[C.sub.ar]), 7.55-7.52 (m, 2H, [H.sub.ar]), 7.43-7.38 (m, 4H, [H.sub.ar] + =CHN), 6.43 (d, 1H, J = 16.0 Hz, =CHCO), 4.68 (t, 2H, J = 5.3 Hz, OC[H.sub.2]), 4.62 (t, 2H, J = 5.2 Hz, C[H.sub.2]N), 2.73 (t, 2H, J = 7.6 Hz, =CC[H.sub.2]), 1.72 (m, 2H, C[H.sub.2]C[H.sub.3]), 0.98 (t, 3H, J = 7.4 Hz, C[H.sub.3]); 13C NMR (101MHz, CD[Cl.sub.3], 25[degrees]C), [delta] (ppm) = 166.3, 148.5, 146.1, 134.0, 130.7, 129.0, 128.2, 121.2, 116.9, 62.6, 49.0, 27.7, 22.7,13.8.
Presentations: "13C NMR Analytical Study to Determine Free Formaldehyde Availability on Two Formaldehyde Donors, Imidazolidinyl Urea and Diazolidinyl Urea," Michael Tallon, John Merianos, Ph.D.
13C NMR isotopomer analysis reveals a connection between pyruvate cycling and glucose-stimulated insulin secretion (GSIS).
Preliminary characterizations of these products by IR, 1H NMR, 13C NMR, GCMS, and HPLC will be described.
Following the overview, a section titled "Processing and Characterization" presents papers including: "Processing and Characterization of Biodegradable Products Based on Starch and Cellulose Fibers"; "Nanocomposite Materials of Thermoplastic Polymers Reinforced by Polysaccharide"; "Alkali Induced Polymorphic Changes of Chitin"; and "13C NMR Quantitative Techniques for Monitoring and Characterizing Biodegradable, Biocompatible Thermoplastics Produced by Bacteria: Using 13C NMR to Monitor and Characterize Poly (b-hydroxyalkanoates) in Living Cells and in Solution."