ORGANOPHOSPHORUS COMPOUNDS WITH TERTIARY ALKYL SUBSTITUENTS. VII1: 1-ADAMANTYLPHOSPHONOSELENOIC DICHLORIDE. THE FIRST EXAMPLE OF A STRUCTURALLY CHARACTERIZED PHOSPHONOSELENOIC DIHALIDE
摘要:
1-Adamantylphosphonoselenoic dichloride 1 was formed in the reaction of the corresponding dichlorophosphine with grey selenium in 42% yield. Compared to other compounds with a P=Se double bond 1 exhibits a strong downfield shift of the Se-77 NMR resonance. The X-ray structure determination reveals a molecule with mirror symmetry and a P=Se bond length of 206.8(2) pm.