Abstract
The crystall and molecular structures of (ClAlN-i-Pr) 6 (I), and of (Me 0.83H 0.17AlN-i-Pr) 6(MeAlN-i-Pr) 6 have been determined by single crystal three-dimensional X-ray analysis. Block-matrix least-squares refinements led to conventional R factor of 0.039 for I and 0.037 for II. The compounds are isostructural, as the cage molecules consist of a prismatic hexagonal framework, (AlN) 6, similar to that observed for the parent hydrogenated analogue (HAlN-i-Pr) 6.Some differences in bond distances and angles are discussed, in connection with the different Al-bonded substituents. Crystal data: I, trigonal space group R 3 ; a = 17.083(2), c = 9.652(1); Z = 3; D c 1.46 g cm −3; II, trigonal space group R 3 , a = 17.378(3), c = 9.706(3) »; Z = 3; D c 1.15 g cm −3.
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