Chemistry haïku from the net ... tout un poème

one femtosecond nucleophile is poised leaving group going	70 eV ionization achieved fragmentation next	molecular angst is caused by torsional strain rotate sigma bond	C-Br pi star Achtung! an incoming nuc Walden inversion!
Proton NMR Excitation pulse begins Can I relax now?	My friends get to jump But I am not permitted Carbon twelve am I	Both reach for the sky Primary, anomeric Beta, poor for food