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Complexes, (H 2 NCOCH 2 CH 2 - C,O )( L )SnCl 3  ( 2 :  L  = XCH 2 CH 2 CONH 2 ; X = H or Cl), rather than (H 2 NCOCH 2 CH 2 - C,O )SnCl 3 , have been isolated from reaction mixtures containing hydrochloric acid, tin and acrylamide in Et 2 O solution. Ligand exchange reactions occur between ( 2: L  = EtCONH2) and HCONMe 2  or HCONHBu. The anionic complex, [pyridinium][(H 2 NCOCH 2 CH 2 -C,O)SnCl 4 ],  3 , was isolated from a reaction mixture composed of pyridine and  2 . In both complex types,  2  and  3 , tin is hexacoordinate, in which the octahedral geometries are somewhat distorted due to variations in the Sn—Cl bond lengths, exemplifying the  trans  effect, and the small bite angles of the chelating (2-amidoethyl- C,O ) ligand. The supramolecular structures are dominated by intermolecular hydrogen-bonds with the NH 2  groups as the donor species. A feature of each crystal structure is a double chain in which the NH 2  group of the (2-amidoethyl-C,O) ligand acts as donor for N—H···X (X = Cl or O) intermolecular hydrogen-bonds.

(2-Amidoethyl)trichlorotin(IV)complexes with amido ligands and chloride ion: supramolecular arrays from H-bonds involving the amido and chloride ions