chelate ring

Molecular models of chelate rings formed by ethane-1,2-diamine and propane-1,3-diamine.

A significant feature of this figure is that the chelate rings shown are obviously not planar.

They typically form 5- and 6-membered chelate rings.

Both oxygen atoms bind to the metal to form a six-membered chelate ring.

Longer chain diamines, which are "floppy", tend not to form chelate rings.

A range of backbones X allows for variation in bite angle and chelate ring size.

Many compounds containing metals in rings are known, for example chelate rings.

Five-membered chelate rings form much more readily than six-membered.

Binding of a bidentate ligand generates one chelate ring.

Its complexes feature alternating five- and six-membered chelate rings.

Six-membered chelate rings are formed by 1,3-diaminopropane.

In both complexes the conformations of the chelate rings are locked with the t-butyl groups equatorial.

One way of representing chelate ring conformations for 5- and 6-membered ring chelates is shown below.

The number of chelate rings is one less than the number of donor atoms in the ligand.

The five-membered chelate ring has a gauche conformation, of absolute configuration λ.

Up to now these complexes have not been studied by X-ray crystallography, although two structures with a six- or a seven-membered chelate ring are possible.

A sexidentate ligand forms five chelate rings.

Although it is relatively inert toward substitution, the complex undergoes bromination at the 3-positions of the chelate rings.

Since catalyts often interconvert between various geometries, the rigidity of the chelate ring can be decisive.

Both molecules contain five-membered C2O2B chelate rings, that in 2 being nearly planar.

Five-membered chelate rings are formed by coordination through the hard alkoxy and the soft thioether donor sites.

Deviations from regular octahedral coordination are due to steric crowding and chelate ring constraints.

A common diphosphine ligand is dppe, which forms a five-membered chelate ring with most metals.

Both compounds have a B,N-betaine structure, the six-membered chelate rings adopting chair conformations.

The anion binds to metal cations through the two oxygen atoms, forming five-membered chelate rings.