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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

In hemoglobin, the iron is enclosed by the porphyrin group (shown below), a flat grouping of carbon, hydrogen, and nitrogen atoms. (This is in turn encased in a protein.) When iron is in the form of the Fe3+ ion, it just fits into the space within the four N atoms, and the arrangement is flat. Speculate on what occurs to the structure when iron is reduced to the Fe2+ ion.

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Interpretation Introduction

Interpretation:

When iron in the porphyrin ring is reduced from  Fe3+ to Fe2+, the changes in the porphyrin structure has to be accounted.

Concept Introduction:

Atomic radii: As the electron is added to the ion or neutral atom, size increases because electron–electron repulsion occurs and also effective nuclear charge decrease because due to addition of one more electron.

Explanation

Iron (II) ions having six electrons in (3d) orbital shells, so these electrons are taking larger energy when compare to the Iron (III) systems. In Fe2+ ion, six electrons are present and in Fe

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