Trimellitate complexes of divalent transition metals with hydrazinium cation thermal and spectroscopic studies

S. Vairam; T. Premkumar; S. Govindarajan

doi:10.1007/s10973-009-0459-8

Trimellitate complexes of divalent transition metals with hydrazinium cation thermal and spectroscopic studies

S. Vairam, T. Premkumar, S. Govindarajan

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

New dihydrazinium divalent transition metal trimellitate hydrates of empirical formula (N₂H₅)₂M(Html) ₂· nH₂O, where n - 1 for M - Co or Ni, and n - 2 for M - Mn, Zn, or Cd (H₃tml - trimellitic acid), and monohydrazinium cadmium trimellitate, [(N₂H₅)Cd(Html) ₁₅· 2H₂O] have been prepared and characterized by physicochemical methods. Electronic spectroscopic, and magnetic moment data suggest that Co and Ni complexes adopt an octahedral geometry. The IR spectra confirm the presence of monodentate carboxylate anion (δm - m _asy(COO^-) - m_sym(COO^-) > 190 cm^-1) and coordinated N₂H₅⁺ ion (m_n-n 1015-990 cm^-1) in all the complexes. All the complexes undergo endothermic decomposition eliminating CO₂ in the temperature region 200-250 °C, followed by exothermic decomposition (in the range of 500-570 °C) of organic moiety to give the respective metal carbonate as the end products except nickel and cobalt complexes, which leave respective metal oxides. X-ray powder diffraction patterns reveal that Ni and Co complexes are isomorphous as are those of, Zn(II) and Cd(II) of the type, (N₂H₅)₂M(Html)₂· 2H ₂O.

Original language	English
Pages (from-to)	955-960
Number of pages	6
Journal	Journal of Thermal Analysis and Calorimetry
Volume	100
Issue number	3
DOIs	https://doi.org/10.1007/s10973-009-0459-8
State	Published - Jun 2010
Externally published	Yes

Keywords

Chemical synthesis
Inorganic compounds
Thermogravimetric analysis (TGA)
X-ray diffraction

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10.1007/s10973-009-0459-8

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title = "Trimellitate complexes of divalent transition metals with hydrazinium cation thermal and spectroscopic studies",

abstract = "New dihydrazinium divalent transition metal trimellitate hydrates of empirical formula (N2H5)2M(Html) 2· nH2O, where n - 1 for M - Co or Ni, and n - 2 for M - Mn, Zn, or Cd (H3tml - trimellitic acid), and monohydrazinium cadmium trimellitate, [(N2H5)Cd(Html) 15· 2H2O] have been prepared and characterized by physicochemical methods. Electronic spectroscopic, and magnetic moment data suggest that Co and Ni complexes adopt an octahedral geometry. The IR spectra confirm the presence of monodentate carboxylate anion (δm - m asy(COO-) - msym(COO-) > 190 cm-1) and coordinated N2H5+ ion (mn-n 1015-990 cm-1) in all the complexes. All the complexes undergo endothermic decomposition eliminating CO2 in the temperature region 200-250 °C, followed by exothermic decomposition (in the range of 500-570 °C) of organic moiety to give the respective metal carbonate as the end products except nickel and cobalt complexes, which leave respective metal oxides. X-ray powder diffraction patterns reveal that Ni and Co complexes are isomorphous as are those of, Zn(II) and Cd(II) of the type, (N2H5)2M(Html)2· 2H 2O.",

keywords = "Chemical synthesis, Inorganic compounds, Thermogravimetric analysis (TGA), X-ray diffraction",

author = "S. Vairam and T. Premkumar and S. Govindarajan",

year = "2010",

month = jun,

doi = "10.1007/s10973-009-0459-8",

language = "English",

volume = "100",

pages = "955--960",

journal = "Journal of Thermal Analysis and Calorimetry",

issn = "1388-6150",

publisher = "Springer Science and Business Media B.V.",

number = "3",

}

TY - JOUR

T1 - Trimellitate complexes of divalent transition metals with hydrazinium cation thermal and spectroscopic studies

AU - Vairam, S.

AU - Premkumar, T.

AU - Govindarajan, S.

PY - 2010/6

Y1 - 2010/6

N2 - New dihydrazinium divalent transition metal trimellitate hydrates of empirical formula (N2H5)2M(Html) 2· nH2O, where n - 1 for M - Co or Ni, and n - 2 for M - Mn, Zn, or Cd (H3tml - trimellitic acid), and monohydrazinium cadmium trimellitate, [(N2H5)Cd(Html) 15· 2H2O] have been prepared and characterized by physicochemical methods. Electronic spectroscopic, and magnetic moment data suggest that Co and Ni complexes adopt an octahedral geometry. The IR spectra confirm the presence of monodentate carboxylate anion (δm - m asy(COO-) - msym(COO-) > 190 cm-1) and coordinated N2H5+ ion (mn-n 1015-990 cm-1) in all the complexes. All the complexes undergo endothermic decomposition eliminating CO2 in the temperature region 200-250 °C, followed by exothermic decomposition (in the range of 500-570 °C) of organic moiety to give the respective metal carbonate as the end products except nickel and cobalt complexes, which leave respective metal oxides. X-ray powder diffraction patterns reveal that Ni and Co complexes are isomorphous as are those of, Zn(II) and Cd(II) of the type, (N2H5)2M(Html)2· 2H 2O.

AB - New dihydrazinium divalent transition metal trimellitate hydrates of empirical formula (N2H5)2M(Html) 2· nH2O, where n - 1 for M - Co or Ni, and n - 2 for M - Mn, Zn, or Cd (H3tml - trimellitic acid), and monohydrazinium cadmium trimellitate, [(N2H5)Cd(Html) 15· 2H2O] have been prepared and characterized by physicochemical methods. Electronic spectroscopic, and magnetic moment data suggest that Co and Ni complexes adopt an octahedral geometry. The IR spectra confirm the presence of monodentate carboxylate anion (δm - m asy(COO-) - msym(COO-) > 190 cm-1) and coordinated N2H5+ ion (mn-n 1015-990 cm-1) in all the complexes. All the complexes undergo endothermic decomposition eliminating CO2 in the temperature region 200-250 °C, followed by exothermic decomposition (in the range of 500-570 °C) of organic moiety to give the respective metal carbonate as the end products except nickel and cobalt complexes, which leave respective metal oxides. X-ray powder diffraction patterns reveal that Ni and Co complexes are isomorphous as are those of, Zn(II) and Cd(II) of the type, (N2H5)2M(Html)2· 2H 2O.

KW - Chemical synthesis

KW - Inorganic compounds

KW - Thermogravimetric analysis (TGA)

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/77954887389

U2 - 10.1007/s10973-009-0459-8

DO - 10.1007/s10973-009-0459-8

M3 - Article

AN - SCOPUS:77954887389

SN - 1388-6150

VL - 100

SP - 955

EP - 960

JO - Journal of Thermal Analysis and Calorimetry

JF - Journal of Thermal Analysis and Calorimetry

IS - 3

ER -

Trimellitate complexes of divalent transition metals with hydrazinium cation thermal and spectroscopic studies

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