Complexes of propyl mercury thiocyanates with cobalt, nickel, and zinc thiocyanate

1982 ◽  
Vol 60 (18) ◽  
pp. 2351-2354 ◽  
Author(s):  
P. P. Singh ◽  
V. P. Singh
Keyword(s):  
General Formula ◽  
Spectral Studies ◽  
Lewis Bases ◽  
Cobalt Nickel ◽  
Anionic Complexes

RHgSCN (R = n-C3H7, (iso-C3H7) react with M(NCS)2 (M = Co(II), Ni(II), Zn(II)) to form compounds of general formula (SCN)2M(NCSHgR)2. Conductance measurements and infrared and electronic spectral studies indicate that M and mercury atoms are linked by bridging thiocyanate groups. Cobalt and zinc are tetrahedrally coordinated, whereas nickel is octahedral. With the exception of zinc analogs, these compounds form complexes with Lewis bases. Pyridine and nicotinamide form adducts of general formula L2(SCN)2M(NCSHgR)2, while 2,2′-bipyridine and 1,10-phenanthroline form cationic–anionic complexes of formula [M(L—L)3][RHg(SCN)2]2.

Chelates of nickel(II) and copper(II) with tridentate Schiff base formed by the condensation of S-benzyldithiocarbazate with benzoin

1978 ◽  
Vol 56 (15) ◽  
pp. 2000-2002 ◽  
Author(s):  
M. T. H. Tarafder ◽  
M. Akbar Ali
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
General Formula ◽  
Schiff Base Ligand ◽  
Nickel Complexes ◽  
Planar Structure ◽  
Spectral Studies ◽  
Square Planar ◽  
Elemental Analyses ◽  
Tridentate Schiff Base

New complexes with the Schiff base ligand derived from S-benzyldithiocarbazate (NH2—NH—CSSCH2C6H5) have been prepared and characterized by elemental analyses, magnetic, conductometric, ir, and electronic spectral studies. The tridentate ONS Schiff base S-benzyl-β-N-(phenyl, phenylhydroxymethyl)methylenedithiocarbazate gave mono-ligand complexes with Ni(II) and Cu(II) having the general formula [MligandX] (M = Ni(II) and Cu(II); X = NO3, Cl, Br, NCS). A proposed square-planar structure for the nickel complexes is supported by magnetic and spectral data. A square-planar structure is also suggested for Cu(II) complexes. The ir results give evidence of the different bondings present in the complexes.

scholarly journals Template Synthesis, Characterization and Reactivities of Anionic Transition Metal Complexes with Tetraaza Protonated 11,13-Dimethyl-1,4,7,10- tetraazacyclotrideca-4,6,10,13-tetraene-5,6-Diol as Cation

2019 ◽  
Vol 31 (12) ◽  
pp. 2924-2930
Author(s):  
B. Vimala ◽  
S.R. Jayapradha ◽  
A. Selvan
Keyword(s):  
Hydrogen Bonding ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Template Synthesis ◽  
Spectral Studies ◽  
Ph Variation ◽  
Anionic Complexes

Template synthesis, characterization and reactivities of anionic transition metal complexes with tetraazaprotonated 11,13-dimethyl-1,4,7,10-tetraazacyclotrideca-4,6,10,13-tetraene-5,6-diol as cation has been achieved. By magnetic and spectral studies, hexachlorometallate(II) anionic complexes have been found to be octahedral. It is envisioned that the cationic macrocycle may be associating with both the complex and chloride anions through hydrogen bonding thereby rendering the molecule as a whole neutral. Deprotonation, protonation analysis and chemosensor behaviour have been showed by pH variation studies and relevant anionic additions, respectively. All of these data supports the newly synthesized anionic complexes in a strange manner.

scholarly journals Spectral studies of bismuth-containing pyrochlores

2021 ◽  
Vol 2103 (1) ◽  
pp. 012146
Author(s):  
S V Nekipelov ◽  
N A Zhuk ◽  
O V Petrova ◽  
D V Sivkov ◽  
K A Bakina ◽  
...  
Keyword(s):  
Charge State ◽  
Solid Solutions ◽  
Pyrochlore Structure ◽  
Spectral Studies ◽  
Nexafs Spectroscopy ◽  
Cobalt Nickel ◽  
Metal Atoms ◽  
Thermal Stable

Abstract Thermal stable solid solutions of titanates, niobates, and tantalates of bismuth with a pyrochlore structure doped with 3d-metal atoms were studied using XPS and NEXAFS spectroscopy. Based on spectral studies, it was shown that the manganese, cobalt, nickel and copper atoms in these solid solutions have mainly charge state +2 and iron atoms – charge state +3.

scholarly journals Spectral studies of transition metal complexes of dihydrobis(1-pyrazoyl)borate with some Lewis bases

2016 ◽  
Vol 10 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Adediran M. Mesubi ◽  
Uche B. Eke ◽  
Oyedele M. Oyeku ◽  
Samson O. Owalude
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Spectral Studies ◽  
Lewis Bases

Synthetic, Infrared, 1Hand 13CNMR Spectral Studies on N-(p-Substituted Phenyl)-p-Substituted Benzenesulphonamides, p-X’C6H4SO2NH- (p-XC6H4), where X’ or X = H, CH3, C2H5, F, Cl or Br

2004 ◽  
Vol 59 (4-5) ◽  
pp. 239-249
Author(s):  
B. Thimme Gowda ◽  
K. L. Jayalakshmi ◽  
Mahesha Shetty
Keyword(s):  
Solid State ◽  
General Formula ◽  
Infrared Spectra ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Vibrational Frequencies ◽  
Spectral Studies ◽  
Benzene Rings ◽  
Electron Donating Groups ◽  
C Nmr

Thirty N-(p-substituted phenyl)-p-substituted benzenesulphonamides of the general formula, p-X’C6H4SO2NH(p-XC6H4), where X’ or X = H, CH3, C2H5, F, Cl or Br, are synthesised and their infrared spectra in the solid state and 1H and 13C NMR spectra in solution are measured. The N-H stretching vibrational frequencies, νN−H vary in the range 3334 - 3219 cm−1, while the asymmetric and symmetric SO2 vibrations appear in the ranges 1377 - 1311 cm−1 and 1182 - 1151 cm−1, respectively. The compounds exhibit S-N and C-N stretching vibrational absorptions in the ranges 937 - 898 cm−1 and 1310 - 1180 cm−1, respectively. There are no particular trends in the variation of these frequencies on substitution with either electron withdrawing or electron donating groups. The 1H and 13C chemical shifts of N-(p-substituted phenyl)-p-substituted benzenesulphonamides,are assigned to various protons and carbons of the two benzene rings. Further, incremental shifts of the ring protons and carbons due to -SO2NH(p-XC6H4) groups in the compounds of the formula, C6H5SO2NH(p-XC6H4), and p-X’C6H4SO2- and p-X’C6H4SO2NH- groups in the compounds of the formula, p-X’C6H4SO2NH(C6H5) are computed and used to calculate the 1H and 13C chemical shifts of the parallely substituted compounds of the general formula p-X’C6H4SO2NH(p-XC6H4). The computed values agree well with the observed chemical shifts. The above incremental shifts are found to correlate with the Hammett substituent parameters.

Synthesis, Characterisation and Spectral Studies of some Molecular Adducts of Organotin(IV) Chlorides with Free Base Meso-Tetraarylporphyrins

2002 ◽  
Vol 2002 (12) ◽  
pp. 611-613 ◽  
Author(s):  
Mozaffar Asadi ◽  
Abedien Zabardasti
Keyword(s):  
General Formula ◽  
Molecular Complexes ◽  
Spectral Studies ◽  
Free Base ◽  
H Nmr ◽  
Elemental Microanalysis ◽  
Molecular Adducts

Some molecular complexes of diethyltin(IV) dichloride and methyltin(IV) trichloride with para-substituted meso-tetraphenylporphyrins of the general formula [(Et2SnCl2)2H2T(4-X)PP] and [(MeSnCl3)2H2T(4-X)PP]; {X= OCH3, CH3, H, and Cl} have been synthesised and characterised by means of 1H NMR, UV-Vis, and elemental microanalysis methods.

Infrared, 1H and 13C NMR Spectral Studies on Di- and Tri-substituted N-Aryl Amides, 2,6-X2C6H3NHCOCH3 – IXi and 2,4,6-X3C6H2NHCOCH3 – IXi (X = Cl or CH3 and I = 0, 1, 2 or 3)

2004 ◽  
Vol 59 (1-2) ◽  
pp. 69-76 ◽  
Author(s):  
B. Thimme Gowda ◽  
K. M. Usha ◽  
K. Jyothi
Keyword(s):  
General Formula ◽  
Benzene Ring ◽  
Chemical Shifts ◽  
Substituent Effects ◽  
Spectral Studies ◽  
Side Chain ◽  
1H And 13C Nmr ◽  
Stretching Vibrations ◽  
Absorption Frequencies ◽  
C Nmr

Several di- and tri-substituted amides of the general formula, 2,6-X2C6H3NHCOCH3−iXi and 2,4,6-X3C6H2NHCOCH3−iXi (X = Cl or CH3 and i = 0, 1, 2, or 3) are prepared, characterised, and their infrared spectra in the solid state and 1H and 13C NMR spectra in solution are studied. The C=O stretching vibrations of N-(2,6-dichlorophenyl)- and N-(2,6-dimethylphenyl)-amides appear as strong absorptions in the ranges 1707 - 1658 cm−1 and 1700 - 1647 cm−1, respectively, while the N-H stretching vibrations of N-(2,6-dichlorophenyl)- and N-(2,6-dimethylphenyl)-amides appear as strong vibrations in the ranges 3271 - 3209 cm−1 and 3285 - 3214 cm−1, respectively. The N-H stretching vibrations of N-(2,4,6-trichlorophenyl)- and N-(2,4,6-trimethylphenyl)- amides also appear as strong absorptions in the ranges 3370 - 3212 and 3283 - 3225 cm−1, respectively, while those of the C=O vibrations appear in the ranges 1688 - 1617 and 1704 - 1647 cm−1. The analysis of the C=O and N-H absorption frequencies of all amides of the general formula XiC6H5−iNHCOCH3−iXi (where X = Cl or CH3, and i = 0, 1, 2 or 3) indicates that their variations do not show regular trends with substitution either in the phenyl ring or in the side chain. The chemical shifts of both the aromatic protons and the aromatic carbons of all the amides are calculated in two ways, either by adding the incremental shifts due to -COCH3−iXi groups and the substituents in the benzene ring to the chemical shifts of the corresponding aromatic protons or carbons of the parent aniline, or by adding the incremental shifts due to -NHCOCH3−iXi groups and the substituents in the benzene ring to the chemical shift of the benzene proton or carbon. The calculated chemical shifts of the aromatic protons and carbons of all the substituted amides by both methods lead to almost the same values in most cases and agree well with the observed chemical shifts, indicating that the principle of additivity of the substituent effects is valid in these compounds.

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