(1-) as a reagent for the synthesis of tin/iron clusters. Partial crystal structure of (NEt4)22>*SnCl4

Article abstract of DOI:10.1016/0022-328X(90)80111-C

The reaction of the NEt4(1+) and PPN(1+) (bis(triphenylphosphine)nitrogen(1+)) salts of (1-) with several tin halides has been investigated.Reaction of (NEt4) with ClSnR3 (R = C6H5, p-C6H4(CH3)) and Cl2Sn(C6H5)2 gives the bimetallic species (NEt4) and (PPN), respectively.Reaction of SnCl4 with (PPN) gives the orange trimetallic complex (PPN)22>.Reaction of with SnCl4 in toluene gives the SnCl4 solvate of the corresponding NEt4(1+) salt, an X-ray diffraction study of which has enabled approximate location of the Sn, Fe, and Cl atoms.The Sn atom in the anion is tetrahedrally surrounded by two chlorides and two Fe(CO)4 units with an average Sn-Fe bond distance of 2.58(3) Angstroem.Addition of an excess of the NEt4(1+) salt to SnCl4 gives the red (NEt4)33>, which reverts to (NEt4)22> up on treatment with 1 equivalent of SnCl4.The use of (PPN)22> as a possible precursor for larger nuclearity clusters has been examined.