Coordination compounds of substituted 1,10-Phenanthrolines and related dipyridyls. V. Complexes of cobalt and 2,9-Dimethyl-1,10-phenanthroline

1965 ◽  
Vol 18 (5) ◽  
pp. 691 ◽  
Author(s):  
DB Fox ◽  
JR Hall ◽  
RA Plowman
Keyword(s):  
Absorption Spectra ◽  
Infrared Spectra ◽  
Coordination Compounds ◽  
Magnetic Moments ◽  
Visible Absorption

A series of complexes of cobalt(II) and 2,9-dimethyl-1,10-phenanthroline (dmp) has been prepared. Complexes of formula CoX2dmp (X = Cl, Br, I, KCS) are monomeric in acetone and camphor and non-electrolytes in nitrobenzene and nitromethane. The magnetic moments and visible absorption spectra favour the assignment of tetrahedral stereochemistry about the Co atom. Complexes containing 2 moles dmp per Co appear to have octahedral arrangements of ligands about the Co atom. These are of the type [CoNO3(H2O)dmp2]X, (X = NO3, ClO4, BPh4) and Co(NCS)2dmp2. The magnetic moments, visible and infrared spectra, and conductances in nitrobenzene and nitromethane support this conclusion. With other mono-dmp complexes (CoX2dmp, X = NO3, �SO4) and bis-dmp complexes {CoXdmp,ClO4,H2O (X = Cl, Br) ; Codmp2(ClO4)2}, stereochemical assignments could not be made.

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.

Coordination Compounds of Substituted 1,lO-Phenanthrolines and Related Dipyridyls. IV. Physicochemical Study of Complexes of Copper and 2,9-Dimethyl-1,10-phenanthroline

1963 ◽  
Vol 16 (1) ◽  
pp. 34 ◽  
Author(s):  
JR Hall ◽  
NK Marchant ◽  
RA Plowman
Keyword(s):  
Organic Solvents ◽  
Infrared Spectra ◽  
Copper Atom ◽  
Coordination Compounds ◽  
Magnetic Moments ◽  
Physicochemical Study ◽  
Magnetic Susceptibilities ◽  
Donor Nitrogen ◽  
Substituted 1

The magnetic susceptibilities, conductivities, and infrared spectra of some complexes of copper and 2,9-dimethyl-1,10-phenanthroline (dmp) have been obtained. The magnetic moments of the copper(II) compounds lie in the range 1.9 to 2.0 B.M. Complexes of formula CudmpX2, where X = NO3, Cl, and Br, are nonelectrolytes in nitrobenzene. The substances Cu(dmp)2X2H2O and hydrated forms of the compounds Cu(dmp)2XClO4, where X = NO3, Cl, and Br behave as 1 : 1 electrolytes. The copper(II) ion in the bis complexes is at least five-coordinate and it is proposed that the donor nitrogen atoms take up a flattened tetrahedral arrangement. The complexes of formula Cu(dmp)2X, where X = NO3, ClO4, Cl, Br. I, and I3 are diamagnetic solids, 1 : 1 electrolytes in nitrobenzene, and are expected to have a tetrahedral arrangement of the four donor nitrogen atoms about the copper atom. The mono complexes CudmpX, where X = Cl, Br, and I are diamagnetic, practically insoluble in organic solvents, and probably dimeric with a tetrahedral arrangement of the ligand donor atoms.

Coordination compounds of substituted 1,10-phenanthrolines and related dipyridyls. X. Complexes of iron, cobalt, and nickel, and 4,6,4',6'-Tetramethyl-2,2'-bipyridine

1966 ◽  
Vol 19 (2) ◽  
pp. 201 ◽  
Author(s):  
JR Hall ◽  
MR Litzow ◽  
RA Plowman
Keyword(s):  
Magnetic Susceptibility ◽  
Absorption Spectra ◽  
Coordination Compounds ◽  
Conductivity Measurements ◽  
Visible Absorption ◽  
Iron Cobalt ◽  
Cobalt And Nickel

The following complexes of 4,6,4',6'-tetramethyl-2,2'-bipyridine (tmb) have been prepared: MCl2 tmb, where M = Fe, Co, and Ni; M(NO3)2 tmb,H2O, where M = Fe and Co; [CoNO3 tmb2]ClO4; and Ni tmb2 (NO3)2,H2O. The structures of these compounds have been determined, as far as possible, by means of magnetic susceptibility and conductivity measurements, and by studies of their infrared and visible absorption spectra.

Coordination Compounds of Substituted 1,10-Phenanthrolines and Related Dipyridyls. II. Complexes of Iron and 2,9-Dimethyl-1,10-phenanthroline

1962 ◽  
Vol 15 (2) ◽  
pp. 235 ◽  
Author(s):  
DB Fox ◽  
JR Hall ◽  
RA Plowman
Keyword(s):  
Solid State ◽  
General Formula ◽  
Infrared Spectra ◽  
Coordination Compounds ◽  
Magnetic Moments ◽  
Tetrahedral Complexes ◽  
Covalently Bound

A number of mono and bis(che1ate) complexes of iron(II) and 2,9-dimethyl-1,10-phenanthroline (dmp) have been isolated. The mono complexes are of general formula FedmpX2, where X=Cl, Br, I ; 2X=SO4. They are yellow to brown in colour except for the sulphato complex, which is pink. Conductivity and cryoscopic measurements indicate that the halogeno compounds are nonelectrolytes and monomeric. The magnetic moments range from 5.1 to 5.4 B.M. The evidence points to these compounds being four-coordinate tetrahedral complexes. The bis(che1ate)complexes are Fe(dmp)2(NO3)2(H2O)2 and Fe(dmp)2(NO3)(ClO4)(H2O)2, both yellow crystalline substances. They are 1 : 1 electrolytes in nitrobenzene and nitromethane. The magnetic moments are 5.2 B.M. for the dinitrate and 5.05 B.M. for the nitrate-perchlorate. According to their infrared spectra, each compound in the solid state appears to contain covalently bound nitrate and is most probably six-coordinate.

Coordination Compounds of Some 3d-Transition Metal Ions with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)- thiosemicarbazide

2008 ◽  
Vol 59 (7) ◽  
Author(s):  
Madalina Angelusiu ◽  
Maria Negoiu ◽  
Stefania-Felicia Barbuceanu ◽  
Tudor Rosu
Keyword(s):  
Coordination Compounds ◽  
Magnetic Moments ◽  
Thermo Gravimetric Analysis ◽  
Electronic Spectroscopy ◽  
Transition Metal Ions ◽  
Synthesis And Characterization ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
New Compounds

The paper presents the synthesis and characterization of Cu(II), Co(II), Ni(II), Cd(II), Zn(II) and Hg(II) complexes with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)-thiosemicarbazide. The new compounds were characterized by IR, EPR, electronic spectroscopy, magnetic moments, thermo-gravimetric analysis and elemental analysis.

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