The work of Slater has shown that the pi and lone pair electrons, being further from the core than the sigma electrons, result in less shielding hence a greater influence of the core on the sigma bonding electrons.23 This is the essence of electronegativity. The count of pi and lone pair...
Effects of the molecular potential on coexcitations of valence electrons in the K -shell photoeffect of 3 p and 4 p elements Photoabsorption spectra of gaseous hydrides of 3p (PH3,?H2S, HCl) and 4p elements (GeH4,?AsH3,?H2Se, HBr) are measured in the energy region within 50 eV ab....
To explain the broader linewidth for the inner valence spectra, we propose that the lifetime of the 2s hole states are shorter because the holes can be filled by 2p electrons in ultra-violet emission or radiationless transition. The theoretical spectra showed good agreement with the observed ...
Partial oscillator strengths (β dependent), from threshold to 49 eV, for the ionisation of 1b 1, 2a 1, 1b 2, 1a 1 electrons from the valence shell of water vapour have been determined using fast (3.5 keV) electron impact with coincidence detection of the scattered and ejected electrons...
Because the in-plane p-electrons of the triple bonds do not contribute to the aromaticity of osmapentalynes, Mo¨bius aromaticity in osmapentalynes should be rooted in osmapentalenes. Therefore, osmapentalenes were also expected to exhibit Mo¨bius aromaticity. Although six-coordinated ...
D3hand C2vgeometries and energies, vertical excitation energies, as well as minimal energy paths as function of the O1(z)-X-O2angle α were obtained for XO3(0,1,1)(X = B, Al, Ga; C, Si, Ge; N, P, As; S, Se) molecules and ions with 22 and 23 valence electrons (VE), us...
Reduction of the α-Keggin anion [Xn+O4W12O36][8 − n]− (X = H22+, B3+, Si4+) by six electrons results in the known tungsten "brown" species [Xn+O4(H2O)3WIV3WVI9O33][8 − n]− in which three W atoms have been reduced from...
If there are any lone pairs, describe what type of orbital contains these electrons. (a) CH3CH=CH2 (b) CH3NH2 Describe the two principles of valence bond theory. Explain why an electron in the bonding molecular orbital in the H_ 2 molecule ...
Assuming that the remaining electron-pair bonds are homopolar, as they are in the above VB struc- tures, the resulting atomic core charges for the six -electrons which occupy the 2p AOs a-e are then (+), (+2), (+), (+2) and (+). !Because the NC spn electrons of structure I...
Despite the fact that non-aqueous uranium chemistry is over 60 years old, most polarised-covalent uranium-element multiple bonds involve formal uranium oxidation states IV, V, and VI. The paucity of uranium(III) congeners is because, in common with metal