Macrocycles are often described as molecules and ions containing a ring of twelve or more atoms. Classical examples include the crown ethers, calixarenes...

subunits with the nitrogen atoms facing outwards from the core of the macrocycle. A porphyrin-related disease: porphyria Porphyrin coordinated to iron:...

regular use.[citation needed] The term macrocycle is used for compounds having a rings of 8 or more atoms. Macrocycles may be fully carbocyclic (rings containing...

time up into three types of cycles: microcycle, mesocycle, and macrocycle. A macrocycle refers to a season of training in its entirety. It is an annual...

consisting of a dumbbell-shaped molecule which is threaded through a macrocycle (see graphical representation). The two components of a rotaxane are kinetically...

hemoglobin and chlorophyll. In these two molecules, in particular, the pyrrole macrocycle ring frames a metal atom, that forms a coordination compound with the...

Michel (1999). "Gold(I) and Gold(0) Complexes of Phosphinine-Based Macrocycles". Angewandte Chemie International Edition. 38 (21): 3194–3197. doi:10...

interlocked molecular architecture consisting of two or more interlocked macrocycles, i.e. a molecule containing two or more intertwined rings. The interlocked...

Pillararenes are macrocycles composed of hydroquinone or dialkoxybenzene units (5 to 10) linked in the para position by methylene bridges. They are structurally...

charge-transfer complexes. Porphyrins have conjugated molecular ring systems (macrocycles) that appear in many enzymes of biological systems. As a ligand, porphyrin...

as covalent organic frameworks, molecular knots, polymers, and novel macrocycles. Not to be confused with dynamic combinatorial chemistry, DCvC concerns...

Gadoteric acid, sold under the brand name Dotarem among others, is a macrocycle-structured gadolinium-based MRI contrast agent (GBCA). It consists of the...

Cyclic peptides are polypeptide chains which contain a circular sequence of bonds. This can be through a connection between the amino and carboxyl ends...

natural products such as heme. Pyrroles are components of more complex macrocycles, including the porphyrinogens and products derived therefrom, including...

thermodynamically or kinetically unlikely, such as in the preparation of large macrocycles. This pre-organization also serves purposes such as minimizing side reactions...

the hydrocarbon cyclo{oligo(1,3-phenylene)methylene}. A calixarene is a macrocycle or cyclic oligomer based on a methylene-linked phenols. With hydrophobic...

Cobalamin structure includes a deprotonated corrin macrocycle....

in heme, cannot accept electrons from the iron center back towards the macrocycle. More electron density is donated to the iron center compared to heme...

of the macrocycle ring absorbs visible light. The nature of the central metal can also influence the absorption spectrum of the metal-macrocycle complex...

Retrieved 2020-06-08. Zhang W, Moore JS (July 2006). "Shape-persistent macrocycles: structures and synthetic approaches from arylene and ethynylene building...

cyclizes the molecule, yielding the unbound product, prerapamycin. The core macrocycle, prerapamycin (figure 2), is then modified (figure 3) by an additional...

known to exist on its own, the molecule is of interest as the parent macrocycle related to the cofactor and chromophore in vitamin B12. Its name reflects...

molecular architecture in which three macrocycles are interlocked in such a way that breaking any macrocycle allows the others to dissociate. They are...

equivalent of the diiodide produced macrocycles in low yields which could be separated by column chromatography. These macrocycles were then reductively aromatized...

cations tend to form stronger complexes, but when large polydentate macrocycles are involved the trend is reversed. In contrast to organomagnesium compounds...

prior to isolation. In 1982, H. Hart et al. reported a synthesis of a macrocycle containing fused furan rings using a Paal–Knorr furan synthesis. Refluxing...

formula C20H14N4. It is heterocyclic and aromatic. The molecule is a flat macrocycle, consisting of four pyrrole-like rings joined by four methine bridges...

most stable rings contain five or six carbon atoms, but large rings (macrocycles) and smaller rings are common. The smallest cycloalkane family is the...

some amino acids, such as glycine. Heme B is the porphyrin derivative macrocycle molecule that holds the iron atom in place in hemoglobin, allowing for...

Siegfried Warwel and Hans Kaitker published a synthesis of symmetric macrocycles through a cross-metathesis dimerization of starting cycloolefins to afford...