Syntheses and crystal structures of three diorganoltin(IV) macrocycles

Three novel macrocyclic diorganotin(IV) compounds of the type: {[R10(SnO)3(SnOH)2]HnXOm}2 <f>·</f> L (<f>n=1</f>, <f>m=4</f>, R=PhCH2, X=P, L=0, 1; <f>n=0</f>, <f>m=4</f>, R=PhCH2, X=S, L=4H2O, 2; <f>n=0</f>, <f>m=3</f>, R=n-Bu, X=N, L=0, 3) were synthesized by the reaction of (PhCH2)2SnCl2 with Na2HnXO4 (<f>n=1</f>, X=P; <f>n=0</f>, X=S) or (n-Bu)2SnCl2 with NaNO3. All the compounds 1, 2 and 3 are characterized by elemental, IR and X-ray diffraction analyses. X-ray data reveal that a macrocyclic structure with two centrosymmetric ladders of hydrolysis exists in the crystals of the three compounds. The geometry about each tin atom involved is trigonal bipyramidal. [Copyright &y& Elsevier]