P- conjugates

Perlmutter P. Conjugate Addition Reactions in Organic Synthesis, Baldwin J. E. and Magnus P. D. (eds), Pergamon Press, Oxford, 1992. 

Hirsch A, Vostrowsky O (2001) Dendrimers with Carbon Rich-Cores. 217 51-93 Hirsch A, Vostrowsky O (2005) Functionalization of Carbon Nanotubes. 245 193-237 Hissler M, Dyer PW, Reau R (2005) The Rise of Organophosphorus Derivatives in p-Conjugated Materials Chemistry. 250 127-163 Hiyama T, Shirakawa E (2002) Organosilicon Compounds. 219 61-85 Holmberg K, see Hager M (2003) 227 53-74... 

The reverse mesomeric effect (p -p conjugation) is believed to be very favourable in the A -phospholen system (5). Compared with the corresponding A -phospholens (6), the conjugated system (5) shows both Y and the phosphorus atom to be deshielded, and the vinyl proton is shielded. The cyclic nature of the molecule is important because the analogous... 

Perlmutter, P. Conjugate Addition Reactions in Organic Synthesis, Pergamon Oxford, 1992. 

N.V. Kamanina, Mechanisms of optical limiting in p-conjugated organic system fullerene doped polyimide, Synthetic Metals, vol. 127, pp. 121-128, 2002. 

The quantum mechanical approach to the problem is based on the Hamiltonian of Equation 3.19b with velocities Qi replaced by momenta P conjugate to the coordinate Qi. P is classically defined... 

Divisia-Blohom B, Genoud F, Borel C, Bidan G, Kem J-M, Sauvage J-P. Conjugated polyme-tallorotaxanes in-situ ESR and conductivity investigations of metal-backbone interactions. J Phys Chem B 2003 107 5126-5132. 

Note that the factor l/(4 2) in the definition (2.3) of our model was chosen with this simple result in mind. The Fourier variable p, conjugate to r, often... 

In addition to a relatively small inductive effect, two modes of stabilization of positive charge by the P-R3M substituent have been suggested. The first involves the classical cation 7, where the positive charge is stabilized by hyperconjugation (G-p conjugation) between the C-M o bonding orbital and the vacant carbocation... 

Reaction of the 6-endo deuterium-labeled silabicyclo[2.2.1]heptane derivative 70 with dichlorocarbene gave the product 71 by insertion exclusively into the C-H bond ann -periplanar to the C-Si bond (Scheme 7).67 The stereoselectivity in this case was rationalized in terms of stabilization of the partial positive charge in the exo direction in the transition state, due to a-p conjugation with the strained C-Si a bond, in addition to a steric effect favoring approach to the exo C-H bond. 

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