Synthesis of the stannatetraphospholanes (tBuP)4SnR2 (R = tBu, nBu, C6H5) and (tBuP)4Sn(Cl)nBu molecular and crystal structure of (tBuP)4Sn(tBu)2

Article abstract of DOI:10.1002/zaac.19966220710

The reaction of the diphosphide K₂[tBuP-(tBuP)₂-PtBu] 4 with the halogenostannanes (tBu)₂SnCl₂, (nBu)₂SnCl₂, (C₆H₅)₂SnCl₂ or nBuSnCl₃ in a molar ratio of 1:1 leads via a [4 + 1]-cyclocondensation reaction to the stannatetraphospholanes (tBuP)₄SnR₂ 3b-3d and (tBuP)₄Sn(Cl)nBu 3e, respectively, with the binary 5-membered P₄Sn ring system. 3b was characterized by a single crystal structure analysis; the 5-membered ring exists in a planar conformation. The compounds 3b-3e were identified by NMR and also by mass spectroscopy; the ³¹P{¹H}-NMR spectra of 3b-3d showed an AA′MM′ (AA′MM′X), 3e on the other hand an ABCD (ABCDX) spin system. Johann Ambrosius Barth 1996.