NMR study of some derivatives of dithiocarbazic acids

Ligational behavior of new mononucleating SNOO thiosemicarbazone ligands towards 3d metal(II) ions: synthesis and spectroscopic studies

“…10.1 and 11.9 ppm in the spectra of the free ligands, are assigned to the 4 NH-amine and 2 NH-hydrazine protons [21]. For both the free ligands and their complexes, there is no sign of a signal from thiol SH, which would be expected around 4 ppm [22]. The signal due to the 2 NH-hydrazine proton is absent and signal due to 4 NH-amine proton is observed upfield in the spectra of the zinc complexes.…”

“…A shoulder at 305 nm in the free ligands is assigned to the n ? p * transition of the amino substituent [22] of the phenyl ring. A band also remains in the same position in the complexes, except C1, C2, C9, C10, and C11 where it may have combined with other intra ligand bands.…”

Synthesis, Structural Characterization, and Biological Application of p-[N,N-bis(2-chloroethyl) Aminobenzaldehyde Thiosemicarbazone and Its Nickel (II) Complex

“…The signals due to the -CH 2 -CH 2 -protons are gave a multiplets at d D 3.59-3.68 ppm. There is no sign of a signal from thiol (-SH) group, which would be expected around 4 ppm [33] strongly confirm thione form.…”

Nuclear magnetic resonance spectroscopy

“…group as a function of the dielectric constant of the solvent (817), lithioisobutyrophenone and its complexes with lithium chloride and bromide (818), alicyclic methyl esters (819) , oligo(oxy-2,2-dimethylethylenecarbonyl) compounds (820) , alkyl substituted furans (821), benzofurans (822), 2-substituted furans, thiophenes, and tellurophenes (823), methyl-substituted 1,3-oxothianes (824), 2-amino-4phenylbenzothiazoles (825), barbiturates (826), coumarin and its methyl derivatives (827), and 5-alkyl-5-(l-methylbutyl)barbituric acids (828) have been described. The NMR determination of electronic densities in quinoxalines and quinolines (829), and symmetrical naphthyridines (830), additivity effects on the H-H coupling constants of disubstituted pyridines (831), 13C-F coupling constants of fluoropyridines (832), medium effects on the 19F NMR of fluoropyridines (833), 13C NMR line intensity measurements for quinoline and other compounds (834), cis and trans isomers of 2-chloroand 2-phenyl-5-methyl-1,3,2-oxathiaphospholane (835), sodium (p-methoxyphenyl)methylphosphinodithioate dihydrate (836), thioand di-thiooxamides (837), derivatives of dithiocarbazic acids (838), quaternary ammonium salts (839), TV-substituted methylamines (840), 2-, 3-, and 4-substituted TV-methylpyridinium salts (841), n-alkyl ammonium salts (842), simple quaternary salts of 1 -methylpyrazole (843), complexes of nitrophenols with dialkylamines (844), nitrotoluidines (845), acyclic aliphatic amines (846), 5-substituted 10,11dihydrobenz[b,f]azepines (847), polytertiary amine chelated alkali metal compounds (848), acrylic amines (849), primary amines (850), pyrrole (851), pyrrole derivatives (852) and tetrapyrroles (853), 8-hydroxyquinoline (854) and its derivatives (855), protonation of L-cysteine (856), protected amino acids (857), determination of glutethimide (858), diazoalkanes (859), substituted pyrazoles (860), 1,4-oxathiane derivatives (861), l-alkyl-2(lH)-pyridinone derivatives (862), purine derivatives…”