can complex compunds have an structures excluding square planner tetrahedral or octahedrtal?

 

 

Yes , like - 

Trigonal planar Geometry: Well known for principle aggregate species like CO32-and so forth., this geometry has the four iotas in a plane with the bond edges between the ligands at 120 degrees. 

• Square pyramid Geometry: Oxovanadium salts (Vanadyl, VO2+) frequently demonstrate square pyramidal geometry, for instance, VO(acac)2. Take note of that the Vanadium(IV) can be considered coordinatively unsaturated and expansion of pyridine prompts the development of an octahedral complex. 

• Trigonal Bipyramid Geometry: The structure of [Cr(en)3][Ni(CN)5] 1.5 H2O • Hexagonal planar Geometry: Unknown for first line move metal particles, in spite of the fact that the course of action of six gatherings in a plane is found in some higher coordination number geometries. 

• Trigonal crystal Geometry: Most trigonal kaleidoscopic mixes have three bidentate ligands, for example, dithiolates or oxalates and few are known for first line move metal particles.