Thermochemistry of Morpholine Adducts of Some Bivalent Transition Metal Bromides

Dunstan, P.O.

doi:10.1021/je8006315

Cited by 7 publications

(12 citation statements)

References 22 publications

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“…Using the standard enthalpies of reaction (∆ r H o ) and appropriate thermochemical cycles [35], the following thermochemical parameters were got: the standard enthalpies of formation (∆ f H o ) from Equation (5), , from Equation (7),…”

Section: Discussionmentioning

confidence: 99%

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Thermochemical Parameters of Tetramethylthiourea Adducts of Certain Metal(II) Bromides

Dunstan¹

2015

OJPC

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Complexes of the general formula [MBr 2 (TMTU) n ] (where M is Mn, Fe, Co, Ni, Cu, Zn or Cd; TMTU is Tetramethylthiourea; n is 0.75, 2 or 3) were obtained by the reaction of salts and ligand in solution. The bromides were selected among several other salts because they had thermochemical data in the literature. Properties as capillary melting points; C, H, N, Br and metal contents; TG/DTG and DSC curves; and IR and electronic spectra were determined. The values of several thermodynamic parameters for the complexes were found by solution calorimetry. From them, the standard enthalpies of the metal-sulphur coordinated bonds were calculated. The standard enthalpies of the formation of the gaseous phase adducts also were estimated.

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Section: Discussionmentioning

confidence: 99%

“…The standard enthalpies of dissolution of Metal(II) bromides, TMTU and complexes were measured [35]. The standard enthalpies of the following reactions were obtained:…”

Section: Calorimetric Measurementsmentioning

confidence: 99%

Thermochemical Parameters of Tetramethylthiourea Adducts of Certain Metal(II) Bromides

Dunstan¹

2015

OJPC

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“…The solution enthalpy measurements of the compounds were made accordingly to the following reactions [38]: …”

Section: Calorimetric Measurementsmentioning

confidence: 99%

“…This table presents the uncertainty intervals as twice the standard deviation of the means of (3 -6) replicate measurements. Using thermochemical cycles [38] and the calculated values for the enthalpies of reaction (5) ( r H o ), the thermochemical parameters for the complexes were estimated. Table 6 presents the values obtained for these enthalpies.…”

Section: Calorimetric Measurementsmentioning

confidence: 99%

Thermochemical Parameters of 3-Chloroaniline Complexes of Certain Bivalent Transition Metal Bromides

Dunstan¹,

Khan²

2013

OJPC

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Complexes of general formula [MBr 2 (3-clan) n ] (where M is Fe, Ni, Cu or Zn; 3-clan = m-chloroaniline; n is 1.5 or 2) were prepared and their characteristic properties, such as capillary MP; C, H, N, Br and metal contents; TG/DTG and DSC curves; and IR and electronic spectra were determined. By calorimetric measurements in solution, the values of some thermodynamic parameters of the complexes were determined. From these values, the standard enthalpies of the metal-nitrogen coordinated bonds were calculated, and the standard enthalpies of the formation of the gaseous phase complexes were estimated.

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“…The standard enthalpies of dissolution of metal(II) bromides, piperazine and complexes were measured [25]. It Table 5 presents the values observed for the enthalpies of dissolution of MBr2 (∆1H o ), for the enthalpies of dissolution of pipz into the solution of MBr2 (∆2H o ) and that of the complexes (∆3H o ).…”

Section: Calorimetric Measurementsmentioning

confidence: 99%

Synthesis, characterization and thermochemistry of piperazine complexes of bivalent metal bromides

Dunstan

Khan

2013

Eur. J. Chem.

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KEYWORDSComplexes of bivalent metal bromides with piperazine were prepared in hot ethanol solution. They have the general formula: [MBr2(pipz)n], where M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II) or Zn(II); pipz = piperazine; n = 1 or 1.5. They were characterized by melting point measurements, elemental analysis, TG/DTG-DSC curves, IR and electronic spectroscopy. The enthalpies of solution of the complexes, salts and ligand were measured by thermo-chemical cycles and several thermochemical parameters were determined. The mean standard enthalpies of the metal-nitrogen coordinated bonds and the enthalpies of gaseous complex formation were also determined.

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Thermochemistry of Morpholine Adducts of Some Bivalent Transition Metal Bromides

Cited by 7 publications

References 22 publications

Thermochemical Parameters of Tetramethylthiourea Adducts of Certain Metal(II) Bromides

Thermochemical Parameters of Tetramethylthiourea Adducts of Certain Metal(II) Bromides

Thermochemical Parameters of 3-Chloroaniline Complexes of Certain Bivalent Transition Metal Bromides

Synthesis, characterization and thermochemistry of piperazine complexes of bivalent metal bromides

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