Thio derivatives of β-diketones and their metal chelates. IX. Nickel and copper complexes of some new fluorinated monothio-β-diketones

1968 ◽  
Vol 21 (7) ◽  
pp. 1781 ◽  
Author(s):  
RKY Ho ◽  
SE Livingstone
Keyword(s):  
General Formula ◽  
High Spin ◽  
Copper Complexes ◽  
Nickel Complexes ◽  
Metal Chelates ◽  
Sulphur Atom ◽  
Derivatives Of ◽  
Infrared Data

Four new fluorinated monothio-β-diketones of general formula RC(SH)=CH- COCF3 have been prepared; they are: l,l,l-trifluoro-4-mercapto-4-(4-methylphenyl)but-3-en-2-one (R = p-methylphenyl), 1,1,1-trifluoro-4-mercapto-4- (4-methoxyphenyl)but-3-en-2-one (R = p-methoxyphenyl), 4-(4-bromophenyl)-l,l,l- trifluoro-4-mercaptobut-3-en-2-one (R = p-bromophenyl), and l,l,l-trifluoro-4- (2-furyl)-4-mercaptobut-3-en-2-one (R = 2-furyl). Their nickel complexes, which are brown and diamagnetic, yield stable high-spin bis-pyridine adducts. When R = p-MeC6H4, p-MeOC6H4, or p-BrC6H4 the ligand yields both copper(1) and copper(11) complexes but when R = 2-furyl only a copper(11) complex is obtained. Infrared data indicate that in the copper(1) complexes the ligand is coordinated through the sulphur atom only.

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.

Sulphur-nitrogen chelating agents. VI. Five- and six-coordinate complexes of 3d metal ions with an SNN tridentate ligand

1969 ◽  
Vol 22 (8) ◽  
pp. 1613 ◽  
Author(s):  
PSK Chia ◽  
SE Livinhstone
Keyword(s):  
Metal Ions ◽  
High Spin ◽  
Infrared Spectra ◽  
Magnetic Moment ◽  
Nickel Complex ◽  
Copper Complexes ◽  
Chelating Agents ◽  
Iron Complex ◽  
Tridentate Ligand ◽  
Infrared Data

Mono-ligand complexes of 6-methylpyrid-2-yl-N-(2?-methylthiophenyl)- methyleneimine (SNSMe) of the type MX2(SNNMe) (M = Mn, Fe, Co, Xi, and Cu; X = Cl, Br, I, or NCS) have been prepared. Infrared data show that in all the complexes the ligand (SNNMe) is tridentate. The electronic and infrared spectra indicate that the complexes of manganese, iron, and cobalt are five-coordinate, whereas the nickel and copper complexes are six-coordinate and polymeric. The complex CO(NO3)2(SNNMe) is six- coordinate and contains one bidentate and one unidentate nitrato group. ��� The bis-ligand complexes [N(SNNMe)2]Y2 (M = Fe, Ni, and Cu; Y = ClO4 or BF4) were also isolated. The iron complex is low-spin (μ 1.5 B.M.) but the magnetic moment of the nickel complex (μ 3.0 B.M.) is normal for high-spin octahedral nickel(II).

Thio derivatives of β-diketones and their metal chelates. VIII. Adducts of metal chelates of fluorinated monothio-β-diketones

1968 ◽  
Vol 21 (1) ◽  
pp. 103 ◽  
Author(s):  
RKY Ho ◽  
SE Livingstone ◽  
TN Lockyer
Keyword(s):  
Molecular Weight ◽  
Metal Complexes ◽  
Infrared Spectra ◽  
Metal Chelates ◽  
Spectral Measurements ◽  
Nitrobenzene Solution ◽  
Nickel Zinc ◽  
Derivatives Of ◽  
Infrared Data ◽  
Palladium Platinum

Complexes of l,l,l-trifluoro-4-mercapto-4-phenylbut-3-en-2-one, PhC(SH)= CHCOCF3, with cobalt(111), nicke1(11), palladium(11), platinum(11), copper(11), zinc(11), cadmium(11), and mercury(11) have been prepared and characterized. Their infrared spectra and the spectra of metal complexes of two other fluorinated monothio-β-diketones are discussed. Adducts of nickel (11) palladium(11), platinum(11), zinc(11), cadmium(11), mercury(11), and lead(11) complexes of the fluorinated monothio-β-diketones, RC(SH)=CHCOCF3 (R = Ph, α-thienyl, or Me), with pyridine, α-picoline, γ-picoline, 2,2'-bipyridyl, 1,l0-phenanthroline, 2,9-dimethyl-1,l0-phenanthroline, 2,2',2"-terpyridyl, or triphenylphosphine are described. Molecular weight and visible spectral measurements on PdL2(PPh3)2 (L = C4H3SC(SH)=CHCOCF3) show that in nitro- benzene and toluene solution one phosphine moiety is lost. Similarly, ZnL2 pic2 (pic = α- or γ-picoline) loses one molecule of picoline in nitrobenzene solution. The infrared data indicate that in the adducts nickel, zinc, and probably cadmium are six-coordinate and palladium, platinum, mercury, and lead are four-coordinate, while zinc is five-coordinate in the mono-adducts ZnL2 pic.

Thio derivatives of β-diketones and their metal chelates. VII. The visible-ultraviolet spectra of some monothio-b-diketones and their metal chelates

1967 ◽  
Vol 20 (6) ◽  
pp. 1079 ◽  
Author(s):  
SHH Chaston ◽  
SE Livingstone
Keyword(s):  
Oxygen Atom ◽  
Electronic Spectra ◽  
Metal Chelates ◽  
Sulphur Atom ◽  
Cadmium Complexes ◽  
Ultraviolet Spectra ◽  
Mercury Complex ◽  
Methyl Derivatives ◽  
Derivatives Of

The electronic spectra of 3-mercapto-1,3-diphenylprop-2-en-1-one, PhC(SH)=CHCOPh, and its zinc(II), silver(I), cadmium(II), mercury(II), and S-methyl derivatives are given and some provisional assignments of the bands are made. The spectra indicate that the oxygen atom of the ligand is weakly coordinated in the silver and cadmium complexes and that in the mercury complex the ligand is coordinated through the sulphur atom only. The spectra of two other monothio-β-diketones, R1C(SH)=CHCOR2 (R1 = R2 = Me, But), are also given. The spectra of the nickel(II) chelates of seven monothio-β- diketones are discussed and the bands are assigned as metal d-d, metal- to-ligand, ligand-to-metal, and ligand-to-ligand transitions.

Sulphur-nitrogen chelating agents. VII. Five- and six-coordinate complexes of cobalt(II), nickel(II), and copper(II) with an S-N-S tridentate ligand

1969 ◽  
Vol 22 (9) ◽  
pp. 1817 ◽  
Author(s):  
SE Livingstone ◽  
JD Nolan
Keyword(s):  
High Spin ◽  
Electronic Spectra ◽  
Copper Complexes ◽  
Chelating Agents ◽  
Nickel Complexes ◽  
Tridentate Ligand ◽  
Octahedral Complex ◽  
Halide Complexes

Mono-ligand complexes of the tridentate ligand N-(2-methylthiophenyl)- 2?-methylthiophenylmethyleneimine (SNS) of the type MX2(SNS) (M = Co, Ni, Cu; X = Cl, Br, I, or FCS) have been prepared. The electronic spectra indicate that the cobalt halide complexes are five-coordinate, whereas the complex Co(NCS)2- (SNS) and the nickel complexes are six- coordinate and polymeric. The copper complexes CuX2(SNS) (X = Cl, Br) are possibly five-coordinate. ��� The bis-complexes of nickel [Ni(SNS)2]X2 (X = ClO4, BF4) are high- spin but the complex [Co(SNS)2](ClO4)2 appears to be a rare example of a low-spin octahedral complex of cobalt(II).

Synthesis, characterization and biological activities of 1,3,4-oxadiazole derivatives of nalidixic acid and their copper complexes

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Nalidixic Acid ◽  
Copper Complexes ◽  
Biological Activities ◽  
Bidentate Coordination ◽  
Antibacterial And Antifungal Activities ◽  
Elemental Analyses ◽  
Oxadiazole Derivatives ◽  
Antibacterial And Antifungal ◽  
Derivatives Of ◽  
Substituted 1

A series of novel 1, 3, 4-oxadiazole analogues was synthesized from cyclization of hydrazones of substituted 1-ethyl-1,4-dihydro-7-methyl-4-oxo-1,8-naphthyridine-3-carbohydrazides were prepared from nalidixic acid. The structures of synthesized oxadiazole derivatives and their copper complexes were elucidated on the basis of FTIR, elemental analyses, 1H-NMR and atomic absorption spectral analysis. It was observed from spectral data that metal ligand ratio was 1:1 in all copper complexes and they were bidentate, coordination was found to be done through oxygen of 4-oxo group and nitrogen of oxadiazole ring. The synthesized compounds were further evaluated with biological activities and compared with parent hydrazones. Copper complexes possess antibacterial and antifungal activities better than the oxadiazoles while they have better antioxidant activity then copper complexes. Parent hydrazones were better in all biological activities than synthesized oxadiazoles.

Toxicity of Para-Chloro Substituted Benzene Derivatives in the Microtox™ Test

1985 ◽  
Vol 20 (2) ◽  
pp. 36-43 ◽  
Author(s):  
Klaus L.E. Kaiser ◽  
Juan M. Ribo ◽  
Brian M. Zaruk
Keyword(s):  
General Formula ◽  
Functional Group ◽  
Structural Parameters ◽  
Systematic Investigation ◽  
Photobacterium Phosphoreum ◽  
Benzene Derivatives ◽  
Quantitative Structure ◽  
Chlorinated Benzenes ◽  
Chloro Derivatives ◽  
Derivatives Of

Abstract This paper gives the results of part of a systematic investigation into contaminant toxicity to Photobacterium phosphoreum in the Microtox™ test. Reported are the toxicity values for 39 para-chloro substituted benzene derivatives of the general formula l-Cl-C6h4-4-X=CH2CH(NH2)COOH, F, SO2NH2, OCH2COOH, CH2COOH, CONHNH2, NHCOCH3, CONH2, CH=CHCOOH, SeOOH, CH2NH2, CH2CH2NH2, NO2, H, CF3, CHO, CH2OH, OH, CH3, CCl3, COCH3, COOH, NH2, SO2C6H5, Cl, CH2COCH3, COCl, CN, OCH3, NCO, NHCH3, I, COC6H5, CH2Cl, SH, CH2SH, NCS, CH2CN and SO2C6H4Cl. Except for the last compound, whose solubility is below the required concentration, the toxicities increase in the presented order with a total range of more than three orders of magnitude. The data are discussed in terms of quantitative structure-toxicity correlations with compound-specific structural parameters. In combination with a previously developed submodel on chlorinated benzenes, phenols, nitrobenzenes and anilines, the observed relationships allow the prediction of the toxicity of some 780 possible chloro derivatives of the general formula C6H5-nClnX, where n=<5 and X is a functional group as listed above.

scholarly journals Explicit, Determinantal, and Recurrent Formulas of Generalized Eulerian Polynomials

Axioms ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 37
Author(s):  
Yan Wang ◽  
Muhammet Cihat Dağli ◽  
Xi-Min Liu ◽  
Feng Qi
Keyword(s):  
General Formula ◽  
Bell Polynomials ◽  
Eulerian Polynomials ◽  
Differentiable Functions ◽  
Faà Di Bruno Formula ◽  
Derivatives Of

In the paper, by virtue of the Faà di Bruno formula, with the aid of some properties of the Bell polynomials of the second kind, and by means of a general formula for derivatives of the ratio between two differentiable functions, the authors establish explicit, determinantal, and recurrent formulas for generalized Eulerian polynomials.

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.

Sign in / Sign up

Export Citation Format

Share Document