Spectra hyper-type

Fig. 2. The three main types of metalloporphyrins spectra 1. Normal spectrum [upper part, solid line, Zn(OEP)] 2. Hypso spectrum [upper part, dashed line, Pt(OEP)] 3. Hyper spectrum [lower part, Fe(OEP)F). The data are taken from Ref. [24). The bands of the normal and hypso type are labeled a, 0, and S ( Soret ), those of the hyper type are given roman numerals increasing with their energy because their assignment is frequently ambiguous...

Fig. 5. Absorption spectra of (a) H2TPP (full line) and H2TF2PP (dashed line) (b) H2TCl2PPethyl (full line) and H2TFPBmethyl (dashed line) and (c) Zn TPP (regular metalloporphyrin, solid line), Cu TPP (hypso-type spectrum, dashed line), and Mn TPPCl in toluene (hyper-type spectrum, dotted line). 

This is one of several reactions of this type in which an organic negative radical-ion and its parent molecule react in the presence of an alkali metal. It is found, rather interestingly, that the rate coefficients depend on the nature of the metal. To account for this, it has been postulated that the metal is involved in a bridging role in the activated complex, e.g., dipy.. K" ". . dipy for the case of 2,2 -dipy-ridyl (dipy) A more extreme case of this association between the radical-ion and the ion of the alkali metal used to form it occurs in the reaction of benzophenone with its negative ion. The spectrum of (benzophenone)" in dme has many hyper-fine lines caused by the interaction of the free electron with the and, when the metal is sodium, the Na nuclei. When benzophenone is added, the structure, due to the proton interaction, disappears and only the lines associated with the sodium interaction remain. To account for this, it has been suggested that the odd electron moves rapidly over all the proton positions too fast for the lines characteristic of the electron in the different proton environments to be seen), but relatively slowly from one sodium nucleus to another. Seen another way, this means that the transfer of an electron from molecule to molecule is associated with the transfer of the cation . ... 

---