Trigonal bipyramidal/octahedral

Linear Trigonal planar Tetrahedral Trigonal bipyramidal Octahedral... 

For tin(IV), the most frequent coordination geometries are based on tetrahedral, trigonal-bipyramidal, octahedral, and pentagonal-bipyramidal polyhedra." In organometallic tin(IV) complexes there is a tendency for the tin atoms to enhance their coordination number either via intra-molecular coordination or inter-molecular association. The final coordination number depends strongly on the number of organic substituents attached to the tin atom and the nature of the donor atoms of the ligands. ... 

Linear Trigonal Planar Tetrahedral Trigonal Bipyramidal Octahedral... 

A transition metal ion is often utilized as a versatile connector in the construction of coordination polymers. Depending on the metal element and its valence, there can be various coordination geometries, e.g., linear, trigonal-planar, T-shaped, tetrahedral, square-planar, square-pyramidal, trigonal-bipyramidal, octahedral, trigonal-prismatic, pentagonal-bipyramidal,... 

Section 8.13 molecular structure valence shell electron-pair repulsion (VSEPR) model linear structure trigonal planar structure tetrahedral structure trigonal pyramid trigonal bipyramid octahedral structure square planar structure... 

Organotin compounds are divalent (Sn(II)) and tetravalent (Sn(IV)) and the coordination numbers of 2, 3, 4, 5, 6 and 7 are known. The 3, 4, 5, 6 and 7 coordination correspond to trigonal, tetrahedral, trigonal bipyramidal, octahedral and pentagonal bipyramidal structures, respectively. 

Amino acid analyses of a variety of hemocyanins indicate that a large amount of histidine and methionine per copper pair is present as well as cysteine, although the number involved in disulfide bridges has not been determined. Intuitively, three types of donor atoms are likely to be involved in these protein complexes, namely, oxygen (carboxylate, phenolate, and water), nitrogen (amine, amide anion, and imidazole), and sulfur (thioether and thiolate). Furthermore, copper (II) can adopt square-planar, square-pyramidal, trigonal-bipyramidal, octahedral, and tetrahedral geometries. 

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