Complexes of copper(II) carboxylates with ammonia. Crystal structure of Cu(O2CC9H19)2(NH3)2(H2O)

Enantiomers of 2-methyl- and 2,4-dimethyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-2-carboxylic acid: Preparation by resolution, determination of absolute configuration, and Curtius rearrangement

“…Data collection and processing. 16 CAD-4 diffractometer, graphite-monochromated Mo-K␣ radiation, /2 scans with variable scan rate and with the scan width (0.9 + 0.3 tan )°, 6,814 reflections measured (1.79 < < 26.99°, 0 < h < 9, −21 < k < 21, −13 < l < 13), 6,160 unique reflections [merging R = 0.0551], giving 3,155 reflections with I > 2(I). No corrections for absorption were required, but the data were corrected for variation in standard intensities during data collection.…”

Enantiomers of 2-methyl- and 2,4-dimethyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-2-carboxylic acid: Preparation by resolution, determination of absolute configuration, and Curtius rearrangement

“…Data collection and processing. 16 CAD-4 diffractometer, graphite-monochromated Mo-K␣ radiation, /2 scans with variable scan rate and with the scan width (0.9 + 0.3 tan )°, 6,814 reflections measured (1.79 < < 26.99°, 0 < h < 9, −21 < k < 21, −13 < l < 13), 6,160 unique reflections [merging R = 0.0551], giving 3,155 reflections with I > 2(I). No corrections for absorption were required, but the data were corrected for variation in standard intensities during data collection.…”

Metal 2-ethylhexanoates and related compounds as useful precursors in materials science

“…The metathesis reaction between an alkali metal alkanoate and a metal salt (eqn (1), n = 5-11 [13][14][15][16][17][18][19][20][21][22][23] (usually sulfate or nitrate) has been exploited for the synthesis of alkanoate derivatives of a large number of metals such as manganese, copper, zinc, lead and lanthanides. The main advantage is a very high yield, usually 90-95% or more.…”

“…Copper(II) alkanoates are the most studied class of metal derivatives of medium chain length alkanoic acids because of their important properties as pharmaceutical agents, fungicides, catalysts, gas occlusion compounds and agents in solvent extraction processes. [13][14][15][16][17][18][19][20][21][22][23]36,40 These compounds show an interesting and definite pattern of structures (Scheme 3). In general, most of the compounds contain a tetraalkanoato Cu 2 (O 2 CR) 4 core having a typical dimeric paddle-wheel structure.…”

“…By increasing the ligand concentration, monomeric complexes Cu(O 2 CR) 2 L 2 are also formed (often with monodentate coordination modes of the alkanoate ligands), where ligands may be in cis (type b) or trans positions (type a). 16,17,[20][21][22] The monomeric-dimeric equilibrium of these copper(II) alkanoates in solution has been studied by UV-Vis spectroscopic and isothermal calorimetric titration. 20 Unlike the reactions of copper(II) hexanoate and heptanoate with 4-aminopyridine (4-apy), which lead to formation of compounds Cu(O 2 CR) 2 (4-apy) 2 (R = C 5 H 11 , C 6 H 13 ), a novel, unprecedented centrosymmetric tetranuclear compound Cu 4 (m 3 -OH) 2 (m,g 2 -O 2 CR) 4 (m,g 1 -O 2 CR) 2 (4-apy) 2 (R = C 7 H 15 ) has been isolated with copper(II) octanoate.…”

“…Mononuclear copper(II) alkanoate complexes have essentially temperature-dependent magnetic moments, in the range of 1.75-2.20 m B 16,17,[20][21][22] indicating interactions between unpaired electrons. On the other hand, di-and polynuclear copper(II) complexes have magnetic moments smaller than these values due to the antiferromagnetic coupling via the alkanoate groups.…”

Enantiomers of 2-methyl- and 2,4-dimethyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-2-carboxylic acid: Preparation by resolution, determination of absolute configuration, and Curtius rearrangement

“…Data collection and processing. 16 CAD-4 diffractometer, graphite-monochromated Mo-K␣ radiation, /2 scans with variable scan rate and with the scan width (0.9 + 0.3 tan )°, 6,814 reflections measured (1.79 < < 26.99°, 0 < h < 9, −21 < k < 21, −13 < l < 13), 6,160 unique reflections [merging R = 0.0551], giving 3,155 reflections with I > 2(I). No corrections for absorption were required, but the data were corrected for variation in standard intensities during data collection.…”

Metal 2-ethylhexanoates and related compounds as useful precursors in materials science

“…The metathesis reaction between an alkali metal alkanoate and a metal salt (eqn (1), n = 5-11 [13][14][15][16][17][18][19][20][21][22][23] (usually sulfate or nitrate) has been exploited for the synthesis of alkanoate derivatives of a large number of metals such as manganese, copper, zinc, lead and lanthanides. The main advantage is a very high yield, usually 90-95% or more.…”

“…Copper(II) alkanoates are the most studied class of metal derivatives of medium chain length alkanoic acids because of their important properties as pharmaceutical agents, fungicides, catalysts, gas occlusion compounds and agents in solvent extraction processes. [13][14][15][16][17][18][19][20][21][22][23]36,40 These compounds show an interesting and definite pattern of structures (Scheme 3). In general, most of the compounds contain a tetraalkanoato Cu 2 (O 2 CR) 4 core having a typical dimeric paddle-wheel structure.…”

“…By increasing the ligand concentration, monomeric complexes Cu(O 2 CR) 2 L 2 are also formed (often with monodentate coordination modes of the alkanoate ligands), where ligands may be in cis (type b) or trans positions (type a). 16,17,[20][21][22] The monomeric-dimeric equilibrium of these copper(II) alkanoates in solution has been studied by UV-Vis spectroscopic and isothermal calorimetric titration. 20 Unlike the reactions of copper(II) hexanoate and heptanoate with 4-aminopyridine (4-apy), which lead to formation of compounds Cu(O 2 CR) 2 (4-apy) 2 (R = C 5 H 11 , C 6 H 13 ), a novel, unprecedented centrosymmetric tetranuclear compound Cu 4 (m 3 -OH) 2 (m,g 2 -O 2 CR) 4 (m,g 1 -O 2 CR) 2 (4-apy) 2 (R = C 7 H 15 ) has been isolated with copper(II) octanoate.…”

“…Mononuclear copper(II) alkanoate complexes have essentially temperature-dependent magnetic moments, in the range of 1.75-2.20 m B 16,17,[20][21][22] indicating interactions between unpaired electrons. On the other hand, di-and polynuclear copper(II) complexes have magnetic moments smaller than these values due to the antiferromagnetic coupling via the alkanoate groups.…”

Enantiomers of 2-methyl- and 2,4-dimethyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-2-carboxylic acid: Preparation by resolution, determination of absolute configuration, and Curtius rearrangement

“…Data collection and processing. 16 CAD-4 diffractometer, graphite-monochromated Mo-K␣ radiation, /2 scans with variable scan rate and with the scan width (0.9 + 0.3 tan )°, 6,814 reflections measured (1.79 < < 26.99°, 0 < h < 9, −21 < k < 21, −13 < l < 13), 6,160 unique reflections [merging R = 0.0551], giving 3,155 reflections with I > 2(I). No corrections for absorption were required, but the data were corrected for variation in standard intensities during data collection.…”

Metal 2-ethylhexanoates and related compounds as useful precursors in materials science

“…The metathesis reaction between an alkali metal alkanoate and a metal salt (eqn (1), n = 5-11 [13][14][15][16][17][18][19][20][21][22][23] (usually sulfate or nitrate) has been exploited for the synthesis of alkanoate derivatives of a large number of metals such as manganese, copper, zinc, lead and lanthanides. The main advantage is a very high yield, usually 90-95% or more.…”

“…Copper(II) alkanoates are the most studied class of metal derivatives of medium chain length alkanoic acids because of their important properties as pharmaceutical agents, fungicides, catalysts, gas occlusion compounds and agents in solvent extraction processes. [13][14][15][16][17][18][19][20][21][22][23]36,40 These compounds show an interesting and definite pattern of structures (Scheme 3). In general, most of the compounds contain a tetraalkanoato Cu 2 (O 2 CR) 4 core having a typical dimeric paddle-wheel structure.…”

“…By increasing the ligand concentration, monomeric complexes Cu(O 2 CR) 2 L 2 are also formed (often with monodentate coordination modes of the alkanoate ligands), where ligands may be in cis (type b) or trans positions (type a). 16,17,[20][21][22] The monomeric-dimeric equilibrium of these copper(II) alkanoates in solution has been studied by UV-Vis spectroscopic and isothermal calorimetric titration. 20 Unlike the reactions of copper(II) hexanoate and heptanoate with 4-aminopyridine (4-apy), which lead to formation of compounds Cu(O 2 CR) 2 (4-apy) 2 (R = C 5 H 11 , C 6 H 13 ), a novel, unprecedented centrosymmetric tetranuclear compound Cu 4 (m 3 -OH) 2 (m,g 2 -O 2 CR) 4 (m,g 1 -O 2 CR) 2 (4-apy) 2 (R = C 7 H 15 ) has been isolated with copper(II) octanoate.…”

“…Mononuclear copper(II) alkanoate complexes have essentially temperature-dependent magnetic moments, in the range of 1.75-2.20 m B 16,17,[20][21][22] indicating interactions between unpaired electrons. On the other hand, di-and polynuclear copper(II) complexes have magnetic moments smaller than these values due to the antiferromagnetic coupling via the alkanoate groups.…”