A Novel Type of Aromaticity

Complexes With Biologically Active Ligands. Part 71 Synthesis andFungitoxic Activity of Metal Complexes Containing 1,3,5‐tris‐(8‐Hydroxyquinolino)‐ Trichlorocyclo‐Triphosphazatriene

“…1, the quinoline nitrogen has the value-0.139, the.oxygen has-0.644 and the chlorine-0.464, respectively, whereas the nitrogen of the phosphazene ring, although having the electronic density in the range of-1.55 1.58, due to steric constraints is probably less available for interaction with the metal ions. [14][15][16] From the above values, it can be concluded that in mononuclear complexes, 3 The only compounds possessing a discrete activity are the Cu(II) derivatives 6 and 7, showing 54 % inhibition of growth at concentrations of 10 t-tM against ,4. niger, but possessing already a moderate activity against the other species. As the other complexes, they are ineffective against Candida.…”

Putting David Craig’s Legacy to Work in Nanotechnology and Biotechnology

“…Craig's understanding of the spectrum of benzene, [14,15,[33][34][35] general aromatic molecules, [36][37][38][39][40] and non-aromatic [41][42][43] molecules paved the way for understanding the properties of molecular spectroscopy and electronic structure in not only the gas phase but also condensed phases. [44][45][46] Perhaps the most important chromophore, however, is chlorophyll-a (Chl-a), yet its visible absorption spectrum was not authoritatively assigned until 2013.…”

“…[289,290] Such a discussion of symmetry was unprecedented in the field of molecular electronics, though it was one of the great successes of molecular spectroscopy decades earlier and a central feature of Craig's works. [14,15,[33][34][35][36][37][38][39][40][41][42][43] A reason for this is that it was reasoned that in general the junctions between arbitrarily positioned molecules and electrodes would not show symmetry. However, we demonstrated that the symmetry of the junction has only a minor effect [291] and can largely be ignored, allowing the full power of group theory to be applied to understand coherent elastic and inelastic electron transport through molecules.…”

Bonding and Magnetism in High Symmetry Nano-Sized Graphene Molecules: Linear Acenes C<SUB>4<I>m</I>+2</SUB>H<SUB>2<I>m</I>+4</SUB> (<I>m</I>=2,&hellip;25); Zigzag Hexangulenes C<SUB>6<I>m</I><SUP>**</SUP>2</SUB>H<SUB>6<I>m</I></SUB> (<I>m</I>=2,&hellip;10); Crenelated Hexangulenes C<SUB>6(3<I>m</I><SUP>**</SUP>2&minus;3<I>m</I

“…(1) The tour-de-force synthesis of the D 6h symmetric crenelated polyaromatic hydrocarbon C 222 H 42 and related materials by K. Müllen and coworkers; 7,8) (2) the proposed singlet diradical ground state for linear polyacenes longer than heptacene; 9,10) (3) the historical record which documents, in the development of quantum chemistry starting from the 1930s, [11][12][13] the important overlapping concepts of conjugated C-C double bonds and aromaticity in novel forms and guises 14) in the polyenes, polycyclic hydrocarbons [15][16][17][18][19] and annulenes. 20) This paper is organized as follows.…”