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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

<TEX>$^1H$</TEX> NMR Study of mono-and di-cyanide ligated Hemin Complexes as Models of Hemoproteins

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1994, v.7 no.4, pp.505-515
Lee, Kang-Bong
Kim, Nam Jun
Kweon, Jeehye
Rhee, Jae-Seong
Choi, Young-Sang
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Abstract

<TEX>$^1H$</TEX> NMR spectra for monocyanide ligated ferriprotoporphyrin(hemin) complex and dicyanide coordinated hemin complex in dimethylsulfoxide(DMSO-<TEX>$d_6$</TEX>) solution have been recorded and analyzed. NMR spectra of hemin-cyanide complexation in DMSO-<TEX>$d_6$</TEX> exhibit that the cyanide ligation to hemin is temperature-dependent. Thermodynamic parameters for the monocyanide ligated hemin to dicyanide ligated hemin are consistent with endothermic process with <TEX>${\Delta}H^{\circ}

keywords
<TEX>$^1H$</TEX> NMR, Hemin complex


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