Maria Cocu

Moldova State University · Institute of Chemistry

Complex investigation on the effect of Thiourea, Galmet and Thiogalmet compositions on water status, intensity of photosynthesis, water use efficiency, growth and yield of ‘P458’ maize plants under conditions of natural humidity in field trials was performed. The beneficial effect of seed and foliage pre-treatment with Thiourea, Galmet and, in part...

A new molecular binuclear vanadium(V) complex [VO(L)(OCH3)]2 (I) is synthesized in which ligand H2L is prepared by the reaction of isonicotinic acid hydrazide (INAH, isoniazide) with 1-phenyl-1,3-butanedione. Ligand H2L and complex I are studied by elemental analysis, IR spectroscopy, mass spectrometry, and X-ray diffraction (XRD) (CIF files CCDC n...

The effect of co-activation of the stress-memory formation potential under repeated drought of Glycine max (Merr.) L. plants was recorded using cytokinin (CK), thiourea (TH) and, especially, complex preparation Polyel. Glycine max plants (Merr.) L. of Moldovitsa, Nadejda and Magia varieties, exposed to two cycles of "drought–rehydration" at the "fi...

A new molecular binuclear vanadium(V) complex [VO(L)(OCH3)]2 (I) is synthesized in which ligand H2L is prepared by the reaction of isonicotinic acid hydrazide (INAH, isoniazide) with 1-phenyl-1,3-butanedione. Ligand H2L and complex I are studied by elemental analysis, IR spectroscopy, mass spectrometry, and X-ray diffraction (XRD) (CIF files CCDC n...

The effect of Thiourea, Galmet and Thiogalmet on the antioxidant protection capacity of plants in moderate drought conditions was studied. Thiogalmet is a new chemical composition that contains Thiourea (Tu) and Galmet - a preparation that consists of a mixture of potassium, ammonium, magnesium gallates, and potassium molybdate and ammonium paramol...

Hydrazones (R1R2C=NNR2R4) represent a class of organic ligands capable to coordinate with diverse metal centers generating varied molecular architectures. The Schiff base with the hydrazone fragment provide a good platform for generating a verity of new ligands their metal complexes with promising chemical, physical, biological properties useful fo...

Four Mn(II) coordination compounds based on the 2,6-diacetylpyridine bis(isonicotinoylhydrazone) (H2L¹) and 2,6-diacetylpyridine bis(nicotinoylhydrazone) (H2L²), were prepared using different synthetic conditions and starting manganese salts: discrete mononuclear [Mn(H2L¹)2(H2O)2](NO3)2 (1) and trinuclear [Mn3(H2L¹)2(NCS)2Cl4(H2O)2] (2) complexes a...

Background Parkinson’s disease (PD) is the second most common progressive neurodegenerative disease. In the advanced stages, the continuous delivery of levodopa (LD) as levodopa-carbidopa intestinal gel (LCIG) has demonstrated significant improvement of motor and nonmotor complications and improvement of the patients’ quality of life (QoL). Despite...

Background A composite instrument able to rapidly and reliably assess the most relevant motor and non‐motor afflictions suffered by Parkinson's disease (PD) patients in a real world clinic setting is an unmet need. The recently‐validated PD Composite Scale (PDCS) was designed to fulfill this gap as a quick, comprehensive PD assessment. Objective E...

New organic ligand L (1) resulting from isonicotinic hydrazide and 2,4-pentanedione has been prepared and investigated by physicochemical methods, including elemental analysis, 1H and 13C NMR, IR spectroscopy and X-ray studies. The X-ray investigation revealed that the condensation of 2,4-pentanedione with isonicotinic hydrazide is accompanied by t...

Mononuclear nickel(II) and copper(II) complexes with Schiff base ligands derived from benzoylacetone S-methylisothiosemicarbazone and 2,6-diformyl-4-methylphenol (CuL1 and NiL1) or 1-hydroxy-2-naphthaldehyde (CuL2 and NiL2) were previously synthesized and investigated.(1, 2) The aim of this work was to investigate the influence of previously obtain...

We have researched the color properties of coordination compounds synthesized by us previously [1] (8-(1',2'-naphthyl)-1-R3-methyl-6-thiomethyl-4,5,7-triazaocta-1,3,5,7-tetraenato-1,1'-diolato(-)O, O', N4, N7-M(II), where R=CH3, C6H5, M=Ni, Co, Cu), which can be used for coloring thermoplastic masses. They meet the requirements for use as a pigment...

This communication deals with the appearance and development of the research in the field of chemistry in the Republic of Moldova; at the beginning - in chemistry sections of Moldovan Branch of the USSR Academy of Sciences and then - at the Institute of Chemistry, founded in 1959. The dynamics of changes in the structure and research subjects is tr...

This work is devoted to the investigation of the template reactions of organic compounds derived from S-alkylisothiosemicarbazide and β-dicarbonylic compounds (acetyl(benzoyl)acetone, 2,6-diformylpyridine, 2,6-diformyl-4-methylphenol, 1-hydroxy-2-naphthaldehyde, sodium nitromalonic dialdehyde, 1,1,3,3-tetraetoxypropane, 3-ethoxyacroleine) in the pr...

The asymmetric complex [Ni(HL)]I (where H2 L is pyridine-2,6-dicarbaldehyde-bis(S-methylisothiosemicarbazone)) is synthesized by the [2 + 1] template condensation of S-methylisothiosemicarbazide hydroiodide with pyridine-2,6-dicarbaldehyde in the presence of nickel(II) acetate. The crystal structure of the [Ni(HL)]I complex (where HL is C11H14N7S2)...

Four new square-planar Ni(II) and Cu(II) complexes with [N2O2] binding system were synthesized by metal-directed condensation of 2,6-diformyl-4-methylphenol with benzoyl or acetylacetone mono-S-methylisothiosemicarbazone. Only mononuclear “one-armed” complexes were obtained as a consequence of the different reactivity of the two carbonyl groups in...

Self-condensation of 1-phenyl-butane-1,3-dione mono-S-methylisothiosemicarbazone (6) in the presence of nickel(II) acetate in methanol gives rise to a mixture of two complexes: [2,9-bis(methylthio)-5,13-dimethyl-7,14-tradeca-2,4,6,9,11, 13-hexaenato(2-)N-1,N-4,N-8,N-11]nickel(II) (7) and [1-amino-1,6-bis(methylthio)-4,9-dimethy-11-phenyl-2,3,4,7,8-...