SEARCH Articles Figures Tables Alkynes and small rings NMR spectra of alkynes and small rings Nuclear magnetic resonance small and large rings Reactivity of Small and Large Rings Rings small, medium and large, definitions Small Rings Cyclopropane and Cyclobutane Small Rings and Conjugated Systems Small rings Small rings introduce strain inside the ring and higher s character outside it Small-ring Compounds of Sulphur and Selenium Structure of Small and Large Rings