LSn(OCH₂CH₂)₂NR (L = lone pair, W(CO)₅; R = Me, <i>t</i>‐Bu). The Molecular Structures of 5‐Aza‐2,8‐dioxa‐1‐stannabicyclo[3.3.0]^1.5octanes and Their Tungstenpentacarbonyl Complexes

Abstract

Abstract Single crystal X‐ray diffraction analyses of LSn(OCH 2 CH 2 ) 2 NR [ 1 , R = Me, L = lone pair; 2 , R = Me, L = W(CO) 5 ; 3 , R = t ‐Bu, L = W(CO) 5 ] reveal these compounds to be dimeric and cis ‐configurated. The dimerization is realized by intramolecular O→Sn interactions to give four‐membered Sn 2 O 2 ‐rings. In addition, there are intramolecular N→Sn interactions ranging in between 2.356(5) ( 2 ) and 2.549(4) Å ( 3 ).