Crystal structure of (2Z)-(3,3-dimethyl-3,4-dihydroisoquinolin- 1(2H)-ylidene)nitrosoacetonitrile

The crystal structure of (2Z)-(3,3-dimethyl-3,4-dihydroisoquinolin-1(2Н)-ylidene)nitrosoacetonitrile is determined (T = 150 K, R1 = 0.0435). The compound crystallizes as the E-cis and Z-cis isomers of the nitroso tautomer. Two independent molecules differ in the rotation of the nitroso group about the bond between the dihydroisoquinoline group and the substituent. Analysis of bond lengths reveals their conjugation and prevailing contribution of the zwitter-ionic structures with the positive charge located on the isoquinoline fragment and the negative charge located on the substituent. Molecules having E and Z conformations are connected by the N–HO hydrogen bond (NO 2.922(3) Å) into dimers. The N–H group of the other molecule forms the intramolecular N–HO hydrogen bond (NO 2.544(3) Å) which closes a sixmembered cycle. Electronic absorption spectra are studied, and quantum-chemical modeling of the compound is performed. © 2017, Pleiades Publishing, Inc

Crystal structure of (2Z)-(3,3-dimethyl-3,4-dihydroisoquinolin- 1(2H)-ylidene)nitrosoacetonitrile

The crystal structure of (2Z)-(3,3-dimethyl-3,4-dihydroisoquinolin-1(2Н)-ylidene)nitrosoacetonitrile is determined (T = 150 K, R1 = 0.0435). The compound crystallizes as the E-cis and Z-cis isomers of the nitroso tautomer. Two independent molecules differ in the rotation of the nitroso group about the bond between the dihydroisoquinoline group and the substituent. Analysis of bond lengths reveals their conjugation and prevailing contribution of the zwitter-ionic structures with the positive charge located on the isoquinoline fragment and the negative charge located on the substituent. Molecules having E and Z conformations are connected by the N–HO hydrogen bond (NO 2.922(3) Å) into dimers. The N–H group of the other molecule forms the intramolecular N–HO hydrogen bond (NO 2.544(3) Å) which closes a sixmembered cycle. Electronic absorption spectra are studied, and quantum-chemical modeling of the compound is performed. © 2017, Pleiades Publishing, Inc

The impact of human capital on engineering innovations

© 2020, World Academy of Research in Science and Engineering. All rights reserved. Goal: To identify the relationship between the intensive economic growth of the state and human capital. Design/Methodology/Approach: The following methods were used: statistical-economic, monographic, and economic-statistical. Conclusions: The authors revealed that the quality of life of the population had a close relationship with the economic growth of the state. The practical implications. The study revealed that the fundamental factor affecting the growth of fundamental macroeconomic indicators was an increase in the welfare of the population. Originality/value: The article considers a number of factors that directly and indirectly affect economic growth

Synthesis, structure, and physicochemical characteristics of the cobalt(II) nitrate complex with α-(3,3-dimethyl-3,4-dihydroisoquinolyl-1)hydroxyiminoacetonitrile [Co(LH)(L)(NO3)]

The cobalt(II) nitrate complex with α-(3,3-dimethyl-3,4-dihydroisoquinolyl-1)hydroxyiminoacetonitrile [Co(LH)(L)(NO3)] (I) has been synthesized and studied by X-ray diffraction, IR, and electronic spectroscopy. One of the ligands is in the molecular form LH, and the other is the L- anion. The two independent ligands bidentately chelately coordinate the cobalt(II) atom via nitrogen atoms. The coordination polyhedron of the cobalt atom is a distorted octahedron. The NO 3 - group is bidentately chelately coordinated. The LH and L ligands are in the same E-s-cis- isomer form. Some data on the IR and electronic spectra of complex I are reported. © 2015 Pleiades Publishing, Ltd

Synthesis, structure, and physicochemical characteristics of the cobalt(II) nitrate complex with α-(3,3-dimethyl-3,4-dihydroisoquinolyl-1)hydroxyiminoacetonitrile [Co(LH)(L)(NO3)]

The cobalt(II) nitrate complex with α-(3,3-dimethyl-3,4-dihydroisoquinolyl-1)hydroxyiminoacetonitrile [Co(LH)(L)(NO3)] (I) has been synthesized and studied by X-ray diffraction, IR, and electronic spectroscopy. One of the ligands is in the molecular form LH, and the other is the L- anion. The two independent ligands bidentately chelately coordinate the cobalt(II) atom via nitrogen atoms. The coordination polyhedron of the cobalt atom is a distorted octahedron. The NO 3 - group is bidentately chelately coordinated. The LH and L ligands are in the same E-s-cis- isomer form. Some data on the IR and electronic spectra of complex I are reported. © 2015 Pleiades Publishing, Ltd

Синтез, строение и физико-химические характеристики комплекса нитрата кобальта (II) с -(3,3-диметил-3,4-дигидроизохинолил-1)гидроксииминоацетонитрилом [Cо(LH)(L)(NO3)]

The cobalt(II) nitrate complex with α-(3,3-dimethyl-3,4-dihydroisoquinolyl-1)hydroxyiminoacetonitrile [Co(LH)(L)(NO3)] (I) has been synthesized and studied by X-ray diffraction, IR, and electronic spectroscopy. One of the ligands is in the molecular form LH, and the other is the L− anion. The two independent ligands bidentately chelately coordinate the cobalt(II) atom via nitrogen atoms. The coordination polyhedron of the cobalt atom is a distorted octahedron. The NO 3 − group is bidentately chelately coordinated. The LH and L ligands are in the same E-s-cis- isomer form. Some data on the IR and electronic spectra of complex I are reported.Синтезирован и исследован методами РСА, ИК- и электронной спектроскопии комплекс нитрата Co(II) с -(3,3-диметил-3,4-дигидроизохинолил-1)гидроксииминоацетонитрилом (LH) состава [Co(LH)(L)(NO3)] (I). Один из лигандов находится в молекулярной форме LН, а другой в форме аниона L-. Два независимых лиганда координируют атом Co(II) бидентатно-хелатным спообом через атомы азота. Координационный полиэдр атома Co искаженный октаэдр. Группа NO координирована бидентатно-хелатным способом. Лиганды LН и L находятся в одинаковой изомерной форме (Е-s-цис). Приведены данные ИК- и электронных спектров комплекса I

Crystal structure of the reaction product of copper(II) nitrate with α-(3,3-Dimethyl-3,4-dihydro-1-isoquinolyl)hydroxy-iminoacetonitrile [Cu3(μ3-OH)(μ-L)3(NO3) 2(H2O)] • 2H2O

The coordination compound [Cu3(μ3-OH)(μ-L) 3(NO3)2(H2O)] • 2H2O (I), where L is the α-(3,3-dimethyl-3,4-dihydro-1-isoquinolyl) hydroxyiminoacetonitrile anion, has been synthesized. The crystal and molecular structure of I was determined by X-ray diffraction (Enraf-Nonius CAD4, MoK α radiation, graphite monochromator, ω-scan mode, 2θmax = 49.96°, 7673 unique reflections, a = 12.745(3) Å, b = 13.726(3) Å, c = 28.835(6) Å, β = 93.44(3)°, V = 5035.2(17) Å3, Z = 4, space group P21/c). In the trimer complex I, the copper atoms are combined by a bridging hydroxy group. The copper atoms are additionally linked pairswise by three tridentate chelating bridging organic anions coordinated to the Cu(II) atoms by the N and O atoms of the deprotonated oxime group and by the N atom of the dihydroisoquinoline moiety. © 2007 Pleiades Publishing, Inc

Copper(I) complex with α-(3, 3-dimethyl-3, 4-dihydroisoquinolyl-1) hydroxyiminoacetonitrile [Cu(LH)L]2 · CH3CN: Synthesis, crystal structure, and spectroscopic characteristics

The complex of univalent copper with α-(3, 3-dimethyl-3, 4-dihydroisoquinolyl-1)hydroxyiminoacetonitrile (LH) is synthesized and studied by X-ray diffraction and IR spectroscopy. As shown by X-ray diffraction analysis, structural crystal units are a binuclear complex consisting of two independent [Cu(LH)L] molecules joined by very strong hydrogen bonds O-H.O and an acetonitrile solvate molecule: [Cu(LH)L]2 · CH 3CN ( I ). The ligands coordinate the copper(I) atom at the vertices of a flattened tetrahedron in the bidentatechelating mode through their nitrogen atoms. The two independent ligands are linked to each copper atom, and one of the ligands exists in the molecular form LH, whereas the other exists in the form of the L ̄ anion. The Cu-N bond lengths range from 1.995 to 2.051 Å, and the NCuN angles are 80.7°-132.8° . All ligands exist in the same E-s-cis isomeric form. The IR spectroscopic characteristics of the complex are presented. © Pleiades Publishing, Inc., 2009

STUDY OF TAUTOMERISM IN A SERIES OF MONOAZOPIGMENTS BASED ON 1-PHENYLAZO-2-OXY-3-PHENYLCARBAMOYLNAPHTHALENE

Tautomerism in a series of monoazopigments based on 1-phenylazo-2-oxy-3-phenylcarbamoylnaphthalene was studied by X-ray photoelectron spectroscopy. The ratio of integral intensities of 01s photoelectron peaks from oxygen atoms occurring in different states in the molecule showed the presence of two tautomeric forms, namely, azo and. quinonehydrazone isomers, and allowed the calculation of their relative contents. Contributions from the two tautomeric forms were directly affected by the nature of substituents