- A detailed analysis of bonding in systems with chains of condensed molybdenum octahedra is given. A one-dimensional model proves to be applicable over the range of molybdates yet synthesized. The electronic coupling between chains is discussed. Distortions in newly synthesized quaternary systems are seen to result from increased electron count on the molybdenum chains. The band theoretic explanation of these distortions parallels the treatment of second-order Jahn-Teller distortions. 1983, American Chemical Society. All rights reserved.