First organotin complex of a phosphonic diamide RP(O)(NHR)2

Diorganotin dichloride-phosphonic diamide complex, [Ph2SnCl2(tBuP(O)(NHiPr)2)2] (1), is prepared by the addition of two equivalents of tBuP(O)(NHiPr)2 to one equivalents of Ph2SnCl2 either in the presence or absence of triethylamine. Compound 1 is a rare example of an all-trans SnA2B2C2 complex that contains H-bonded six-membered rings which are made up of six different main group elements.