SN2P2: A Neutral Five-Membered Sulfur-Pnictogen(III) Ring

摘要

The novel aromatic ring compound 2,4-diphospha-3,5-diaza-thiole (cyclo-SNPNP) was synthesized via flash pyrolysis of SP(N-3)(3) and characterized by IR spectroscopy and N-15 isotope labeling. Quantum chemical computations indicate its formation by head-to-tail dimerization of SNP and subsequent elimination of a sulfur atom from the highly unstable boatlike six-membered-ring compound cyclo-SNPSNP.