✍ Scribed by J. G. Robles-Martínez; A. Salmerón-Valverde; C. Soriano; E. Alonso; A. Zehe
No coin nor oath required. For personal study only.
A series of metal containing organic compounds of the M[HNAFIN], . 2TCNQ-type, being M either Ni, Pd, Pt, Cu or Zn, have been prepared and studied in respect to infrared absorption spectra. Characteristic IR absorption spectra for each of the compounds are manifest, depending on the nature of the metal introduced. In particular is the C = N stretch mode absorption spectrum for Ni-containing compounds rather sharp and single peaked, while Pt and Zn containing compounds present more complex features.
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Specimens were embedded in Spurr's resin and sectioned with an Ultramicrotome (Leica Ultracut). Transverse sections of colloid-filled membranes with thicknesses ranging from 40 to 100 nm were obtained. Images of sections were acquired by JEM 2000FX, Philips CM 120 BioTWIN cryo, and Philips FEG CM 20
Electronic and structural properties of three protonated forms HFl , ox q Ž . q Ž .x H Fl N , and H Fl N of lumiflavin have been determined at the HFr3-21G level 2 ox 5 2 ox 1 of approximation. Larger delocalization and basicity explain the favorable protonation of N with respect to N whereas N prot