26 research outputs found
Synthesis of mesityl oxide Ο-complexes with metals of chromium subgroup and with iron. Theoretical and experimental investigation of the ligand dissociation energy
At the use of photochemical and thermochemical activation new Ο-complexes of chromium, molybdenum, and tungsten were prepared containing in the coordination sphere Ξ·2- and Ξ·4-molecules of 4-methyl-3-penten-2-one. Nonempirical methods were applied to calculation of the energy parameters of the coordinated molecules, and the factors governing the Ξ·2- and Ξ·4-coordination of the oxodiene system were established. A thermochemical study was performed on the 4-methyl-3-penten-2-one Ξ·4-coordination product with carbonyl metal core. A scheme of the thermal decomposition was suggested for the iron (0) Ξ· 4-(4-methyl-3-penten-2-one)tricarbonyl. Β©2005 Pleiades Publishing, Inc
Synthesis and hydrophosphorylation of Ο-complexes of Esters of unsaturated carboxylic acids with chromium subgroup metals
Photochemical and thermochemical activation were used to prepare new Ο-complexes of chromium, molybdenum and tungsten containing Ξ· 2- and Ξ· 4-coordinated methyl acrylate, methyl cynnamate, and dimethyl fumarate molecules. Geometric, electronic, and energetic parameters of the coordinated ester molecules were found and factors governing Ξ· 2- and Ξ· 4-coordination of the oxodiene system were revealed by nonempirical calculations. Monocarboxylic acid esters incorporated in the Ο-complexes react with dialkyl hydrogen phosphites to give dialkyl acyl phosphites coordinated with the metal center and susceptible to oxidation the corresponding phosphates. In this case, the phosphorylation involves the OH-tautomer of dialkyl hydrogen phosphite. Coordinated dimethyl fumarate undergoes phosphorylation by two concurrent pathways, viz. transesterification or Pudovik reaction. In the latter case, fragmentation of the organometallic compound takes place
Synthesis, structure, and hydrophosphorylation of Ο-complexes derived from tert-butyl(1,3-dimethyl-2- butenylidene)amine and homoligand iron(0) and group VIb metal carbonyls
New iron(0), chromium(0), molybdenum(0), and tungsten(0) Ο-complexes containing Ξ·2-, Ξ· 3-, and Ξ·4- coordinated tert-butyl(1,3-dimethyl-2-butenylidene)amine ligands were synthesized under conditions of photochemical and thermal activation. The geometric, electronic, and energetic parameters of the coordinated 1,3-azadiene were calculated by nonempirical methods, and factors determining the mode of coordination were established. The obtained Ο-complexes reacted with dialkyl phosphonates in the presence of triethylamine to afford organometallic Ξ±-aminophosphonates; hydrophosphorylation in the absence of a catalyst gave the corresponding amidophosphate which then underwent rearrangement into Ξ±-aminophosphonate. Β© 2004 MAIK "Nauka/Interperiodica"
Addition of dialkyl hydrogen phosphites to alkenes in the presence of carbonyl complexes of chromium subgroup metals and iron
Depending on the reactant ratio and order of their mixing, reactions of dialkyl hydrogen phosphite with alkenes in the presence of catalytic amounts of homoligand carbonyl complexes of iron or chromium subgroup metals yield phosphonates by two pathways: reaction of dialkyl hydrogen phosphite with Ο-coordinated alkene and addition to alkene of the product of reaction of dialkyl hydrogen phosphite with the transition metal carbonyl. The products of reactions of Fe(CO)5 and W(CO)6 with dialkyl hydrogen phosphites contain the phosphorus-metal bond
Problems and Prospects of the Development of the Quality Management System During the Digitalization of the Economy
Π‘ΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΉ ΡΡΠ°ΠΏ ΠΌΠΈΡΠΎΠ²ΠΎΠ³ΠΎ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈ ΡΠΎΡΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°Π·Π²ΠΈΡΠΈΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΠΌ Π²Π»ΠΈΡΠ½ΠΈΠ΅ΠΌ Π½Π° Π½Π΅Π³ΠΎ ΡΠΈΡΡΠΎΠ²ΠΈΠ·Π°ΡΠΈΠΈ. ΠΡΠ΅ Π±ΠΎΠ»ΡΡΠ΅Π΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΠΏΡΠΈΠΎΠ±ΡΠ΅ΡΠ°Π΅Ρ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ Π²ΡΠ΅Ρ
ΡΡΠ΅Ρ ΠΌΠ΅Π½Π΅Π΄ΠΆΠΌΠ΅Π½ΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π²Π½Π΅Π΄ΡΠ΅Π½ΠΈΡ Π½ΠΎΠ²ΡΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ ΠΈ ΠΏΠ»Π°ΡΡΠΎΡΠΌ. Π¦ΠΈΡΡΠΎΠ²ΡΠ΅ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΡ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΡΠΌ Π΄Π»Ρ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΠ³ΠΎ ΡΠ°Π·Π²ΠΈΡΠΈΡ. Π Π°Π·Π²ΠΈΡΠΈΠ΅ ΡΠΈΡΡΠΎΠ²ΡΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ ΠΎΠΊΠ°Π·ΡΠ²Π°Π΅Ρ ΡΠ°ΠΊΠΆΠ΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΈ Π½Π° ΡΠ°Π±ΠΎΡΡ ΠΏΡΠ΅Π΄ΠΏΡΠΈΡΡΠΈΠΉ, ΠΏΡΠΈΠΌΠ΅Π½ΡΡΡΠΈΡ
Π² ΡΠ²ΠΎΠ΅ΠΉ ΠΏΡΠ°ΠΊΡΠΈΠΊΠ΅ ΡΡΠ°Π½Π΄Π°ΡΡΡ ΡΠ΅ΡΠΈΠΈ ISO 9000. Π¦ΠΈΡΡΠΎΠ²ΠΈΠ·Π°ΡΠΈΡ ΡΠΈΡΡΠ΅ΠΌ ΠΌΠ΅Π½Π΅Π΄ΠΆΠΌΠ΅Π½ΡΠ° Π² ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΡΡ
ΡΠΎΠ·Π΄Π°Π΅Ρ ΡΠ½ΠΈΠΊΠ°Π»ΡΠ½ΡΠ΅ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ Π΄Π»Ρ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΊΠ°ΡΠ΅ΡΡΠ²ΠΎΠΌ ΠΏΡΠΎΠ΄ΡΠΊΡΠΎΠ² ΠΈ ΡΡΠ»ΡΠ³. Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ Π²ΠΎΠΏΡΠΎΡ Π²Π»ΠΈΡΠ½ΠΈΡ ΡΠΈΡΡΠΎΠ²ΠΈΠ·Π°ΡΠΈΠΈ Π½Π° ΡΠ°Π·Π²ΠΈΡΠΈΠ΅ ΡΠΈΡΡΠ΅ΠΌΡ ΠΌΠ΅Π½Π΅Π΄ΠΆΠΌΠ΅Π½ΡΠ° ΠΊΠ°ΡΠ΅ΡΡΠ²Π° Π² ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΡΡ
, Π° ΡΠ°ΠΊΠΆΠ΅ Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡΠΈΠ΅ ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ ΠΈ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Ρ. ΠΡΠ»ΠΈ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ Π·Π°Π΄Π°ΡΠΈ, ΠΊΠΎΡΠΎΡΡΠ΅ ΡΠ»Π΅Π΄ΡΠ΅Ρ ΠΏΡΠΈΠ½ΡΡΡ ΠΊ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΈΡ Π² Π±ΡΠ΄ΡΡΠ΅ΠΉ ΡΡΡΠ°ΡΠ΅Π³ΠΈΠΈ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΡΠΈΡΡΠ΅ΠΌΡ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° Π² ΡΠ°ΠΌΠΊΠ°Ρ
ΡΠΈΡΡΠΎΠ²ΠΈΠ·Π°ΡΠΈΠΈ.The current stage of world economic and social development is characterized by a significant impact of digitalization on it. Transformation of all spheres of management based on the introduction of new technologies and platforms is becoming increasingly important. Digital transformation is necessary for companies for sustainable development. The development of digital technologies also has an impact on the work of enterprises applying ISO 9000 series standards in their practice. The digitalization of management systems in organizations creates unique opportunities for managing the quality of products and services. The article discusses the issue of the impact of digitalization on the development of a quality management system in organizations, as well as emerging problems and prospects. The important steps that should be taken into consideration for the development of quality system in the future strategy were considered in the framework of digitalization
Synthesis, structure, and hydrophosphorylation of Ο-complexes derived from tert-butyl(1,3-dimethyl-2- butenylidene)amine and homoligand iron(0) and group VIb metal carbonyls
New iron(0), chromium(0), molybdenum(0), and tungsten(0) Ο-complexes containing Ξ·2-, Ξ· 3-, and Ξ·4- coordinated tert-butyl(1,3-dimethyl-2-butenylidene)amine ligands were synthesized under conditions of photochemical and thermal activation. The geometric, electronic, and energetic parameters of the coordinated 1,3-azadiene were calculated by nonempirical methods, and factors determining the mode of coordination were established. The obtained Ο-complexes reacted with dialkyl phosphonates in the presence of triethylamine to afford organometallic Ξ±-aminophosphonates; hydrophosphorylation in the absence of a catalyst gave the corresponding amidophosphate which then underwent rearrangement into Ξ±-aminophosphonate. Β© 2004 MAIK "Nauka/Interperiodica"
Synthesis of mesityl oxide Ο-complexes with metals of chromium subgroup and with iron. Theoretical and experimental investigation of the ligand dissociation energy
At the use of photochemical and thermochemical activation new Ο-complexes of chromium, molybdenum, and tungsten were prepared containing in the coordination sphere Ξ·2- and Ξ·4-molecules of 4-methyl-3-penten-2-one. Nonempirical methods were applied to calculation of the energy parameters of the coordinated molecules, and the factors governing the Ξ·2- and Ξ·4-coordination of the oxodiene system were established. A thermochemical study was performed on the 4-methyl-3-penten-2-one Ξ·4-coordination product with carbonyl metal core. A scheme of the thermal decomposition was suggested for the iron (0) Ξ· 4-(4-methyl-3-penten-2-one)tricarbonyl. Β©2005 Pleiades Publishing, Inc
Addition of dialkyl hydrogen phosphites to alkenes in the presence of carbonyl complexes of chromium subgroup metals and iron
Depending on the reactant ratio and order of their mixing, reactions of dialkyl hydrogen phosphite with alkenes in the presence of catalytic amounts of homoligand carbonyl complexes of iron or chromium subgroup metals yield phosphonates by two pathways: reaction of dialkyl hydrogen phosphite with Ο-coordinated alkene and addition to alkene of the product of reaction of dialkyl hydrogen phosphite with the transition metal carbonyl. The products of reactions of Fe(CO)5 and W(CO)6 with dialkyl hydrogen phosphites contain the phosphorus-metal bond
Synthesis, structure, and hydrophosphorylation of Ο-complexes derived from tert-butyl(1,3-dimethyl-2- butenylidene)amine and homoligand iron(0) and group VIb metal carbonyls
New iron(0), chromium(0), molybdenum(0), and tungsten(0) Ο-complexes containing Ξ·2-, Ξ· 3-, and Ξ·4- coordinated tert-butyl(1,3-dimethyl-2-butenylidene)amine ligands were synthesized under conditions of photochemical and thermal activation. The geometric, electronic, and energetic parameters of the coordinated 1,3-azadiene were calculated by nonempirical methods, and factors determining the mode of coordination were established. The obtained Ο-complexes reacted with dialkyl phosphonates in the presence of triethylamine to afford organometallic Ξ±-aminophosphonates; hydrophosphorylation in the absence of a catalyst gave the corresponding amidophosphate which then underwent rearrangement into Ξ±-aminophosphonate. Β© 2004 MAIK "Nauka/Interperiodica"
Synthesis and hydrophosphorylation of Ο-complexes of Esters of unsaturated carboxylic acids with chromium subgroup metals
Photochemical and thermochemical activation were used to prepare new Ο-complexes of chromium, molybdenum and tungsten containing Ξ· 2- and Ξ· 4-coordinated methyl acrylate, methyl cynnamate, and dimethyl fumarate molecules. Geometric, electronic, and energetic parameters of the coordinated ester molecules were found and factors governing Ξ· 2- and Ξ· 4-coordination of the oxodiene system were revealed by nonempirical calculations. Monocarboxylic acid esters incorporated in the Ο-complexes react with dialkyl hydrogen phosphites to give dialkyl acyl phosphites coordinated with the metal center and susceptible to oxidation the corresponding phosphates. In this case, the phosphorylation involves the OH-tautomer of dialkyl hydrogen phosphite. Coordinated dimethyl fumarate undergoes phosphorylation by two concurrent pathways, viz. transesterification or Pudovik reaction. In the latter case, fragmentation of the organometallic compound takes place