G = R, Y, or a group of formula (i) or (ii): B1 = single or double bond which may be in the E-(trans)-form, the Z-(cis)-form or in the form of an E/Z mixture; B2, B3 = B1; or B2+B3 = epoxide or cyclopropane ring in the E-(trans)-form, the Z-(cis)-form or...
according to the Walsh bonding model of cyclopropane.2 These electrons which are found on the outside of the cyclopropyl ring,2 may act as proton acceptors in H bonds.3 Pseudo-n electrons that may participate in H bonding in BIC are found on the outside of the C4-C5 and C5-C6 bonds....
MASS FORMULAThe delocalization of a-electrons from bonds to bonds in three and four-membered ring molecules was studied in a theoretical manner. The antibonding property of the a-electron delocalization between geminal C-C bonds increases in perfluorocyclopropane (5) and cyclopropene (8) while it...
The structure of this complex showed two [Co(BMPyTr)Cl2]·H2O molecules as an asymmetric formula, which were slightly different in their geometric parameters (Table 2). In this neutral complex, the Co(II) was penta-coordinated with two chloride ions and three nitrogen atoms from the BMPyTr ...
Adjusted and reprinted with permissions from the American Chemical Society (A), the Royal Society of Chemistry (B), and Springer Nature (C). Several gas-phase ion–ion reactions have also been developed and used for lipid C=C localization. For example, C=C bond positions and cyclopropane ...
Following the antecedents described above, we have prepared dirhodium-silver anionic one-dimensional coordination polymers of (PPh4)n[Rh2(μ-O2CR)4Ag(CN)2]n (R = Me (3), Ph (4), CH2OEt (5)) formula by reaction between discrete dinuclear building blocks with two labile ligands in the ...
environment around aromatic amino acids, and π–π interactions in the 15 lowest energy models for each of the four types of pili were analyzed. According to helical parameters (Figure 4), the average density of aromatic rings for the four types of pili was computed by the formula: ...
Table 1. Details of the crystal structure determination and selected structural data of [Pt(bpy)(cod)(Me)][SbF6]. Formula/weight (g/mol) crystal system/space group cell a/b/c (Å)/β (°) V (Å)3/Z ρcalc (g/cm3)/μ (mm−1) Limiting indices C19H23F6N2Pt1Sb1/710.23 ...
One-dimensional coordination polymers of (PPh4)n[Rh2(µ-O2CR)4Ag(CN)2]n (R = Me (3), Ph (4), CH2OEt (5)) formula have been obtained by replacement of the two labile molecules in the axial positions of the paddlewheel structures by a [Ag(CN)2]− bridging unit. The crystal...