Synthesis and structure of the macrocycle [(OCH_2CEt_2CH_2O){P(N-t-Bu)_2P}]_2

摘要

The compound [(OCH_2CEt_2CH_2O){P(N-t-Bu)_2P}]_2 (7) has been synthesized by the reaction of the cyclodiphosphazane [ClPN-t-Bu]_2 (1) with an equimolar quantity of 2,2-diethyl-1,3-propanediol.An X-ray structure determination confirms that it is a 16-membered macrocycle.This mode of reaction is compared with those of 1 with various other difunctional amines/alcohols where only monomeric (in cyclodiphosphazane units) compounds are isoalted.Reaction of 1 with half mole equivalents of the diols HOCH_2CR_2CH_2OH [R=H,Me,Et] afforded products formulated as (OCH_2CR_2CH_2O){P(N-t-Bu)_2PCl}_2.Attempts to incorporate lithium ion into 7 and the related methyl compound [(OCH_2CMe_2CH_2O){P(N-t-Bu)_2P}]_2 (4) have not been successful.