File Name : figure s1.tif Caption : figure s1 selected structural parameters of the optimized geometries of complexes 3 – 8. File Name : figure s2.tif Caption : figure s2 selected structural parameters of the optimized geometries of complexes 9 – 12. File Name : figure s3.tif Caption : figure s3 selected structural parameters of the optimized geometries of complexes 13 – 15. File Name : figure s4.tif Caption : figure s4 3d surfaces plot of homo of nh₃ and lumo of cluster 1.