Some amine-thiocyanate complexes of nickel(II)

1966 ◽  
Vol 19 (8) ◽  
pp. 1423 ◽  
Author(s):  
NF Curtis ◽  
YM Curtis
Keyword(s):  
Infrared Spectra ◽  
Reflectance Spectra ◽  
Magnetic Susceptibilities ◽  
Thiocyanate Ion ◽  
Thiocyanate Complexes

The preparation and properties of Ni(l,3-pn)2(NCS)2, Ni(trien)(NCS)2, Ni(tet a)(NCS)2, Ni(tet b)(NCS)2, Ni(dien)(NCS)2, Ni(dpt)(NCS)2, Ni(en)2NCSClO4, and Ni(trien)NCSClO4 are described (1,3-pn = 1,3-diaminopropane, trien = triethylenetetramine, tet a and tet b are isomeric hexamethylcyclotetradecanes, dien = diethylenetriamine, dpt = dipropylenetriamine, en = ethylenediamine). The first four compounds are normal N-bonded dithiocyanato derivatives, the dien and dpt derivatives have structures with one N-bonded terminal, and one bridging thiocyanate ion, and the thiocyanate perchlorate compounds have structures with a bridging thiocyanate ion. Magnetic susceptibilities (all μeff c. 3.1 B.M.), infrared spectra (including that of N-deuterated Si(l,3-pn)2(NCS)2), reflectance spectra, and conductances in methanol and acetone are reported.

scholarly journals Resonanz-Raman-Effekt von Thiocyanatkomplexen einiger Übergangsmetalle

1970 ◽  
Vol 25 (10) ◽  
pp. 1394-1400 ◽  
Author(s):  
W. Krasser ◽  
H. W. Nürnberg
Keyword(s):  
Raman Spectrum ◽  
Infrared Spectra ◽  
High Intensity ◽  
High Frequency ◽  
Resonance Raman ◽  
Ammonium Salts ◽  
Iron Cobalt ◽  
Decay Products ◽  
Thiocyanate Complexes ◽  
Resonance Raman Spectra

Abstract The thiocyanates of the transition metals iron, cobalt, copper as well as of rhenium and of tech-netium appear in solution as strongly coloured complexes. The resonance raman bands in the sol-vent acetonitrile are investigated. To achieve an unambiguous identification the infrared spectra were recorded too. The change in position and structure of the acetonitrile bands indicates strong complexation of iron, cobalt and copper with acetonitrile, thus indicating the existence of mixed acetonitrile-thiocyanate complexes. The resonance raman spectra of the rhenium-and technetium-thiocyanates present as tetramethyl ammonium salts show however no raman-and infrared-bands of complexed acetonitrile molecules.In the raman spectrum of the thiocyanates of iron, cobalt and copper mainly the totally sym-metric C≡N, S-C, Me-S and Me-N valence vibrations are observed, among which the S-C vibration shows a remarkably high intensity. Besides, a series of bands is obtained which is inter-preted partly as caused by decay products, and partly as bands of complexed acetonitrile. The thiocyanates of rhenium and of technetium show the three possible valence vibrations only. The high frequency of the S-C valence indicates the N-coordination of the thiocyanate group.

Some studies in inorganic complexes. XXV. Cobalt(II) and nickel(II) complexes of 2-Acetamidopyridine and 2-Aminomethyl-6-rnethylpyridine, and the cobalt(II) complex of 2-Methylpyridine-6-carboxylic acid

1969 ◽  
Vol 22 (9) ◽  
pp. 1841 ◽  
Author(s):  
KH Shaw ◽  
GJ Sutton
Keyword(s):  
Magnetic Properties ◽  
Carboxylic Acid ◽  
Absorption Spectra ◽  
Infrared Spectra ◽  
Reflectance Spectra ◽  
Inorganic Complexes

Complexes of cobalt(II) and nickel(II) with the ligands 2- acetamidopyridine (acpy) and 2-aminomethyl-6-methylpyridine (mepic) have been prepared and studied. They included [Co(acpy)2X2], [Co(mepic)2X2], [Ni(acpy)2X2], and [Ni-(mepic)2X2], in which X is Cl, Br, I, or NCS; [Co(acpy)2(NO3)2], [Co(mepic)2(NO3)2], [Ni(acpy)2(NO3)2], [Ni(mepic)3NO3]NO3, [Co(acpy)3](ClO4)2, [Co(mepic)3](ClO4)2, [Co(mepic)3](CoCl4), [Ni(acpy)2(H2O)2](ClO4)2, and [Ni(mepic)2(H2O)2](ClO4)2. The inner complex of 2-methylpyridine-6- carboxylic acid [Co(mepiac)2,2H2O)] was also isolated. In all cases, the magnetic properties, conductances, reflectance spectra, absorption spectra, and infrared spectra are in agreement with the concept that they are spin-free, six-coordinate octahedral complexes. The substance [Ni(mepic)2NO3]NO3 contains both bidentate and ionic nitrate.

Tetracyanonickelate(II) compounds of some (tetraazamacrocycle)nickel(II) cations. The structure of catena-Di(μ-cyano)dicyano(N-meso-5,7,7,12,14,14-hexamethy1-1,4,8,11-tetraazacyclotetradeca-1, 11-diene)dinicke1(II) hydrate

1984 ◽  
Vol 37 (9) ◽  
pp. 1799 ◽  
Author(s):  
GJ Gainsford ◽  
NF Curtis
Keyword(s):  
Infrared Spectra ◽  
Ground State ◽  
Singlet Ground State ◽  
Ring Size ◽  
Triplet Ground State ◽  
Coordination Environment ◽  
Magnetic Susceptibilities ◽  
X Ray ◽  
A Chain ◽  
Tetracyanonickelate Compounds

Tetracyanonickelate(II) compounds of several (tetraazamacrocycle)nickel(II) cations have been prepared. The structure of the N-meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca- 4,11-diene, hmtd, compound [Ni(hmtd)Ni(CN)4].H2O has been determined by X-ray diffractometry [monoclinic, a 1780.3(3), b 1063.41(7), c 1409.3(2) pm, β 120.54(1)�, 24, space group C2/c, R 0.021, Rw 0.030 for 2178 reflections] and shows a chain polymeric structure with trans singlet ground state [Ni(CN)4]2- groups linking parallel stacked triplet ground state [Ni(hmtd)]2+ groups. The triplet ground state nickel(II) ions have a tetragonally elongated coordination environment [Ni-N (mean macrocycle) 204.5(1) pm, Ni-N (N≡C) 220.7(1) pm]. Tetracyanonickelate compounds of macrocycles related to hmtd but with different substituents, macrocycle ring size, and/or numbers of imine and amine donor groups were prepared. Some are diamagnetic, with discrete cation and anion, while others are similar to the hmtd compound, and for the latter, tetragonal distortions were evaluated from the reflectance spectra. Magnetic susceptibilities and infrared spectra are reported.

Coordination compounds of substituted 1,10-phenanthrolines and related bipyridyls. XI. Physicochemical study of complexes of copper(II) and 2-Methyl-1,10-phenanthroline

1970 ◽  
Vol 23 (4) ◽  
pp. 691 ◽  
Author(s):  
EW Ainscough ◽  
RA Plowman
Keyword(s):  
Organic Solvents ◽  
Infrared Spectra ◽  
Coordination Compounds ◽  
Water Solution ◽  
Sodium Perchlorate ◽  
Copper Nitrate ◽  
Visible Absorption ◽  
Magnetic Susceptibilities ◽  
Excess Copper ◽  
Donor Nitrogen

Solutions of 2-methyl-1,10-phenanthroline (rnep) with excess copper(II) salts in organic solvents yielded complexes of the formula Cu(mep)X2 (X = NO3, Cl, Br, I). These were non-electrolytes in nitrobenzene. When excess rnep was present bis- complexes of the type Cu(mep)2Cl2,6H2O, Cu(mep)2/sub>(NO3)2,H2O, and hydrated forms of the type Cu(mep)2XClO4 (X = Cl, NO3) were obtained. These were 1 : 1 electrolytes in nitrobenzene and the copper(II) ion was at least five-coordinated with the donor nitrogen atoms taking up a flattened tetrahedral arrangement. Hydrated copper(II) perchlorate with rnep in a 1 : 2 or 1 : 1 ratio yielded Cu(mep)2(ClO4)2,2H2O which is a 2 : 1 electrolyte in nitrobenzene. From a water solution of copper nitrate and rnep in the ratio 1 : 3.5, a complex Cu(mep)3(ClO>sub>4)2 precipitated upon the addition of a sodium perchlorate solution. I t was thought previously that this compound did not exist. The magnetic susceptibilities, the conductivities, and the visible, absorption, and infrared spectra of some rnep complexes have been obtained and structures are proposed from this information.

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