Distortions from trigonal prismatic geometry for several structurally characterized clathrochelate complexes: significance of π-backbonding on clathrochelate coordination geometry

Anionic Bipyridyl Ligands for Applications in Metallasupramolecular Chemistry

“…At 1.490 , the average BÀO bond length of the tetragonal boronate esters is similar to what is found for mononuclear chlathrochelates with boronate ester caps. [7,10] The N atoms of the pyridyl groups in 4 and 5 are 17.91 and 17.87 apart from each other, respectively. The clathrochelate ligands are thus substantially longer than mononuclear clathrochelates of type D (14.95 ; Figure 1).…”

Ligand design of zero-field splitting in trigonal prismatic Ni(ii) cage complexes

“…A complicating feature in the analysis of the D trend is that the changes to the coordination geometries with functional groups are minor, 63 but may be significant for the zero-field splitting. 50 From 1 to 5, an increase in D is observed with an increase in the average Ni-N distance across the series with 1 showing the shortest Ni-N distances (ca.…”

Structural chemistry of complexes with an encapsulated metal ion. α-Dioximate, oximehydrazonate, and dihydrazonate clathrochelates

“…The majority of structures known are solved for the complexes of iron(II), which is the most efficient template, and trigonal boron com pounds, which are the most active cross linking agents (electron pair acceptors, viz., Lewis acids). For boron Y = Sb, Sn, Ge clathrochelate, which is analogous to the above men tioned ruthenium complex, 31 were determined. Macro bicyclic cobalt(III) tris dimethylglyoximates and tris nioximates formed by tin(IV) tetrachloride and tetrabromide were structurally characterized in most detail.…”