Thio derivatives of β-Diketones and their metal chelates. III. Metal chelates of some fluorinated Monothio-β-diketones

1966 ◽  
Vol 19 (7) ◽  
pp. 1179 ◽  
Author(s):  
RKY Ho ◽  
SE Livingstone ◽  
TN Lockyer
Keyword(s):  
Organic Solvents ◽  
Metal Chelates ◽  
Complexing Ability ◽  
Derivatives Of

Metal chelates of 1,1,1-trifluoro-4-mercapto-4-(2-thienyl)but-3-en-2 one, C4H3SC(SH)=CHCOCF3 (TTMBH), and 1,1,1-trifluoro-4-mercaptopent-3-en-2-one, MeC(SH)=CHCOCF3 (TMPH) have been prepared. Inner complexes of both TTMBH and TMPH were obtained with cobalt(III), nicke1(II), palladium(11), platinum(II), zinc(II), cadmium(11), mercury(11), and lead(II); they are readily soluble in organic solvents. TTMBH gives the spin-free complex Fe(TTMB)3, the copper(II) complex Cu(TTMB)2, and the μ-dioxo-bridgedvanadium(1V) compound V2O2(TTMB)4. Iron(III) and copper(II) oxidize TMPH to the disulphide (TMP)2; however, a polymeric copper(I) complex Cu(TMP) was isolated. The complexing ability of TMPH appears to be weaker than that of TTNBH.

Thio derivatives of β-diketones and their metal chelates. II. α-Substituted Monothio-β-diketones as ligands

1965 ◽  
Vol 18 (12) ◽  
pp. 1927 ◽  
Author(s):  
RKY Ho ◽  
SE Livingstone ◽  
TN Lockyer
Keyword(s):  
Carbon Atom ◽  
Metal Complexes ◽  
Infrared Spectra ◽  
Steric Hindrance ◽  
Metal Chelates ◽  
Methyl Group ◽  
Central Carbon Atom ◽  
Complexing Ability ◽  
Central Carbon ◽  
Derivatives Of

The α-methyl substituted monothio-β-diketones, 4-mercapto-3-methylpent-3-en-2-one, MeC(SH)=C(Me)COMe, and 3-mercapto-2-methyl-1,3-diphenylprop-2-en-1-one, PhC(SH)=C(;Me)COPh, were prepared; the former was not obtained pure. The complexing ability of these ligands appears to be weaker than that of other monothio-β-diketones; this can be partly explained on the basis of steric hindrance caused by the methyl group attached to the central carbon atom. The diamagnetic complexes, Ni(MeCS=CMeCOMe)2, Co(MeCS=CMeCOMe)3, and Ni(PhCS=CMeCOPh)2 were obtained but attempts to prepare other metal complexes of these ligands were unsuccessful. The infrared spectra of the three metal chelates display four characteristic bands for which assignments are given: 1570-1540 cm-1, v(C--C); 1525-1500 cm-1, v(C-0); 1230-1223 cm-1, v(C--8); 497-458 cm-1, v(M-0).

Thio derivatives of β-diketones and their metal chelates. XIX. Metal chelates of two new fluorinated Monothio-β-diketones and their mass spectra

1975 ◽  
Vol 28 (6) ◽  
pp. 1249 ◽  
Author(s):  
SE Livingstone ◽  
N Saha
Keyword(s):  
Mass Spectra ◽  
Metal Chelates ◽  
The Novel ◽  
Copper Chelates ◽  
Derivatives Of

The nickel(II), palladium(II), platinum(II), copper(II), zinc(II) and rhodium(III) chelates of the new fluorinated monothio-β-diketones RC(SH)=CHCOCF3 (R = Pri, Bui) and the iron(III), ruthenium(III) and cobalt(III) chelates of PriC(SH)=CHCOCF3 have been prepared. The mass spectra of all but the two copper chelates have been obtained. The novel features of the spectra are the occurrence of the ions M-(R-H), M-R, and M-LH and the loss of H2S from the ions M-LH and M-L.

Synthesis of Red Luminescent Non Symmetric Styryl-4H-Pyran-4-Ylidene Fragment Containing Derivatives for Organic Light-Emitting Diodes

2011 ◽  
Vol 222 ◽  
pp. 271-274 ◽  
Author(s):  
Elmars Zarins ◽  
Janis Jubels ◽  
Valdis Kokars
Keyword(s):  
Organic Solvents ◽  
Spectral Properties ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Amorphous Films ◽  
Light Emitting ◽  
Organic Light ◽  
Volatile Organic ◽  
Derivatives Of

New organic glassy non symmetric styryl- derivatives of 2(2,6-substituted-4H-pyran-4-ylidene)-malononitrile, 2(2,6-substituted-4H-pyran-4-ylidene)-1H-indene-1,3(2H)-dione and 2(2,6-substituted-4H-pyran-4-ylidene)-pyrimidine-2,4,6(1H,3H,5H)-trione were synthesized. They form thin solid amorphous films from volatile organic solvents (DCM and chloroform). Their spectral properties have been studied.

Thio derivatives of β-diketones and their metal chelates. XXIII. Adducts of nickel(II) chelates of fluorinated Monothio-β-diketones with nitrogen heterocycles

1976 ◽  
Vol 29 (6) ◽  
pp. 1209 ◽  
Author(s):  
SE Livingstone ◽  
JH Mayfield ◽  
DS Moore
Keyword(s):  
Carbonyl Group ◽  
Infrared Spectra ◽  
Nitrogen Heterocycles ◽  
Metal Chelates ◽  
Derivatives Of

Paramagnetic adducts of the nickel(11) chelates of the fluorinated monothio-β-diketones RC(SH)=CHCOCF3 (R = β-naphthyl, p-ClC6H4, m-ClC6H4, m-BrC6H4, m-MeC6H4, 3,4-Cl2C6H3) have been obtained with pyridine, y-picoline, 2,2'-bipyridyl, and 1,l0-phenanthroline. They are of the type NiL2(base)2 (L = RCS=CHCOCF3; base = py, γpic, �bpy, �phen). With 2,2',2"-terpyridyl two types of adduct were isolated: (a) mononuclear NiL2(trpy) and (b) trinuclear Ni3L6(trpy)2. The infrared spectra of all the adducts display v(C-O) in the range 1552-1580 cm-l; this band is characteristic of a bidentate monothio-β-diketonato ligand. The spectra of the mononuclear terpyridyl adducts display in addition a v(C=O) band at c. 1650 cm-1, indicating that one carbonyl group is not coordinated.

scholarly journals Thio derivatives of β-diketones and their metal chelates. XX. Magnetic moments of some ruthenium(III) chelates of fluorinated Monothio-β-diketones

1975 ◽  
Vol 28 (11) ◽  
pp. 2531 ◽  
Author(s):  
SE Livingstone ◽  
JH Mayfield ◽  
DS Moore
Keyword(s):  
Room Temperature ◽  
Magnetic Moments ◽  
Metal Chelates ◽  
Magnetic Data ◽  
Derivatives Of

Magnetic data have been obtained for ruthenium(III) chelates of the fluorinated monothio-β-diketones RC(SH)=CHCOCF3 (R = 2-thienyl, β- naphthyl, Ph,p-MeC6H4, m-MeC6H4, m-ClC6H4, m-BrC6H4).The compounds are low-spin (S = 1/2) with moments in the range 1.68-1.84 B.M. at room temperature; the moments decrease with decrease in temperature.

Metal chelates in adsorption polarography I: Mo(VI) and derivatives of oxine

1987 ◽  
Vol 92 (1-3) ◽  
pp. 121-131 ◽  
Author(s):  
Balazs Magyar ◽  
Peter Richner
Keyword(s):  
Metal Chelates ◽  
Derivatives Of

Thio derivatives of β-diketones and their metal chelates. XI. Stability constants of nicke(II), copper(II). zinc(II), cadniium(II), and lead(II) chelates of two monothio-β-diketones

1969 ◽  
Vol 22 (7) ◽  
pp. 1363 ◽  
Author(s):  
SE Livingstone ◽  
EA Sullivan
Keyword(s):  
Stability Constants ◽  
Water Solution ◽  
Supporting Electrolyte ◽  
Nickel Complexes ◽  
Metal Chelates ◽  
Acid Dissociation ◽  
Acid Dissociation Constant ◽  
Chloro Complexes ◽  
Lead And Cadmium ◽  
Derivatives Of

The acid dissociation constant (pKD) of the monothio derivative of benzoyl-acetone, viz. 3-mercapto-1-phenylbut-2-en-1-one (I), was found to be 10.43 in 74.5 vol. % dioxan-water solution. Stoicheiometric stability constants (log kn) of five metal chelates of (I) and of the monothio derivative of dibenzoylmethane, viz. 3-mercapto-1,3- diphenylprop-2-en-1-one (II), have been measured in 74.5 vol. % dioxan- water solution with both chloride and perchlorate as supporting electrolyte. ��� With chloride as supporting electrolyte the values obtained for log kav are as follows: with ligand (I), copper(II) 10.11, nickel(II) 9.25, zinc(II) 6.68, lead(II) 6.06, cadmium(II) 6.12; with ligand (II), copper(II) 10.66, nickel(II) 10.20, zinc(II) 7.44, lead(II) 7.11, cadmium(II) 6.90. With perchlorate as supporting electrolyte zinc, lead, and cadmium give values of log kav which are 1.5-1.9 units greater. The thermodynamic stability constants (logKn) were calculated from the stoicheiometric constants by use of the equations ���������� Log K1 = logk1 + 2.30������� logK2 = log k2 + 1.15 For the copper and nickel complexes of both (1) and (II) log Kav is greater than pKD; such a situation has been reported in only a few instances. ��� From the data obtained with chloride as a supporting medium, approximate stoicheiometric stability constants were calculated for the chloro complexes MCl+ (M = Zn, Cd, Pb) in 74.5 vol. % dioxan. The values obtained were: ZnCl+, 5.0; CdCl+, 5.7; PbCl+, 5.0.

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