BIOL1001 Lecture Notes - Lecture 9: Phospholipid, Coenzyme A, Estrogen
Document Summary
Compounds: atoms exchange/share e with other elements to form compounds- type of compound depends on en (electronegativity) Polarity of molecules: e sharing in covalent compounds is not always even- dependent on relative en and molecule shape. Atoms: composed of a positive nucleus (p + n) surrounded by negative e, e arranged in particular energy levels (shells) The further from the nucleus, the more energy possessed. Ionic compounds (m + nm)- large en difference exchange. Covalent compounds (nm + nm)- small en difference share. Even sharing = no net dipple = non-polar molecule. Non-even sharing = net diple = polar molecule (one molecule has higher affinity for e and will hold closer) Exist between polar groups where h is bound to f, o, n (highly en) E drawn away from h- becomes + F, o, n- becomes - where + species/parts of species are attracted to loan e- pairs: dipole-dipole: (electrostatic interactions, dispersion forces:
