Tetranuclear Cobalt(III) Complex Having the Cubane Co4O4 Core: Synthesis and Structural Analysis of the Complex Containing (2-Pyridylmethyl)glycine

Abstract

A tetranuclear cobalt(III) complex with the cubane Co4O4 core, [Co4(pg)4(μ3-O)4] (Hpg: N-(2-pyridylmethyl)glycine), was prepared and the structure was determined by the X-ray diffraction method. This complex has the four N–H···O intramolecular hydrogen-bonds between the amino group on one of the four cobalt atoms and the carboxyl group on another cobalt atom. Its neutral aqueous solution showed no spectral change for at least 3 days.

The photodecarboxylation of [N,N-bis(2-pyridylmethyl)amino acidato]phenanthrolinecobalt(III) complexes: – formation and decomposition of metallacyclic species †

“…The metal-ligand bond lengths are marginally shorter than those found in a related tetranuclear cobalt() complex of N-(2-pyridylmethyl)glycinate. 10 The assignment of the stereochemistry of the N,N-bis(2pyridylmethyl)alaninato ( 6) and cyclopropyl-N,N-bis-(2pyridylmethyl)glycinato ( 7) complexes from NMR data was less straightforward than for the parent complex, as the alkyl substituent breaks the C s symmetry. However, the chemical shifts of the protons of the two pyridine rings and those of the picolyl methylene groups in both complexes are similar to those observed for 5.…”

[Co4O4]4+ Cubane Core as a Brønsted Base: Preparation and Properties of [Co4O3(OH)(O2CR)2(bpy)2]3+ and [Co4O2(OH)2(O2CR)2(bpy)2]4+ Salts

“…The Co 4 complex contains a [ Co 4 O 4 ] 4+ cubane core, the first example of such a species (although additional examples have since been identified 10,11 ), and this structural motif is also to be found in the Co 8 complexes. In [Co 8 O 4 (O 2 CPh) 12 (MeCN) 3 -(H 2 O)], the [Co 4 O 4 ] 4+ cubane is acting as a quadruple bridge to four Co II ions, the µ 3 -O 2ions of the cubane core thus becoming µ 4 .…”

Ni(II) N-(2-Pyridylmethyl)-L-Alanine) Complex: Structural Diversity and Photoluminiscent Studies

“…This can be understood based on the symmetry criteria that the absence of improper axis of rotation results in chirality [7]. Metal complexes of N-(2-pyridylmethyl)-amino acid derivatives with different spacers have been reported to have multiple attractive architectures including multidimensional and oligomeric structures with cavities, channels and chiral capsules owing to their robust hydrogen-bonding ability and inherent chirality [11]- [20]. In the pioneering work in these fields, N-(2-pyridylmethyl)-alanine has been used to build the copper, cobalt and zinc complexes [20].…”

“…Metal complexes of N-(2-pyridylmethyl)-amino acid derivatives with different spacers have been reported to have multiple attractive architectures including multidimensional and oligomeric structures with cavities, channels and chiral capsules owing to their robust hydrogen-bonding ability and inherent chirality [11]- [20]. In the pioneering work in these fields, N-(2-pyridylmethyl)-alanine has been used to build the copper, cobalt and zinc complexes [20]. There have been few reports on new nickel (II) with N-(2-pyridylmethyl)-alanine in literature [10].…”