CHEM 1A Lecture Notes - Lecture 5: Covalent Bond, Diamagnetism, Paramagnetism
Document Summary
(cid:1680)s and (cid:1681)s (cid:283)ouplin(cid:322)s are (cid:283)ontrolled (cid:282)(cid:482) distan(cid:283)e r. In hea(cid:475)ier elements, ao mi(cid:481)in(cid:322) in diatomi(cid:283)s onl(cid:482) happens in pairs due to s(cid:482)mmetr(cid:482) Ho(cid:476) (cid:282)i(cid:322) the e di(cid:498)(cid:321)eren(cid:283)e (cid:282)t(cid:476) aos is. Stron(cid:322)est mi(cid:481)in(cid:322) (cid:282)t(cid:476) aos o(cid:321) similar e. Mo ener(cid:322)ies are a(cid:282)o(cid:475)e and (cid:282)elo(cid:476) ori(cid:322)inal ao ener(cid:322)ies. Sigma or(cid:282)ital s: end-to-end o(cid:475)erlap, a(cid:481)ial s(cid:482)mmetr(cid:482), (cid:283)(cid:482)lindri(cid:283)all(cid:482) s(cid:482)mmetri(cid:283)al. Pi or(cid:282)itals : side-to-side o(cid:475)erlap, nodal plane (cid:283)ontains mole(cid:283)ular (cid:282)ond. Less than (cid:1680)(cid:1681) e-s: more than (cid:1680)(cid:1681) e-s: Paramagnetism : o(cid:283)(cid:283)urs (cid:476)hen mo has unpaired e-s.
