ChemInform Abstract: Bend the Coin Your Way: Ligand Design and Main Group Element Chemistry.

Abstract

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Perspectives on parity violation in chiral molecules: theory, spectroscopic experiment and biomolecular homochirality

“…The importance of molecular chirality in chemistry can also be exemplied by three special issues of Chimia over the rst decades of the century. One, in 2001 describing the research of a large chemistry department aer moving to new buildings at the start of the century, 17 where a substantial fraction of the research groups worked on subjects with an essential 'chirality' component [18][19][20][21][22][23][24][25][26][27][28][29][30] (and further research at least also partially on chirality aspects), one in 2008, devoted to the chemistry of chirality, [31][32][33][34][35][36][37][38][39][40] and a last one in 2018 (ref. 41) where we might highlight the work on ultracold chiral molecules, 42 new approaches to the determination of absolute conguration, 43 and work on the CISS effect (chiral induced spin selectivity).…”

“…Instead of asking about the time dependence of observables, of which there are many, one might ask the opposite question, whether in a complex time evolving system there are observables which remain constant in time, the 'constants of the motion'. These are all the observables C j for which the corresponding operators Ĉj commute with the Hamiltonian Ĥ Making use of the solution of the Heisenberg equations of motion given by eqn (23) the time independence of Ĉj can be proven in one line, because Û being a function of Ĥ, eqn (22), it commutes with the Ĉj as well and it is also unitary Û † Û ¼ 1, thus:…”