Bis(benzotriazol-1-yl)methane as a linker in the assembly of new copper(II) coordination polymers: Synthesis, structure and investigations

Supramolecular Layer Structures of Mn(II), Co(II), and Cu(II) Complexes with the 3-(1H-Benzotriazol-1-yl)propaneamide Ligand: Metal Coordination vs Hydrogen Bonding

“…Aggregation of one-dimensional coordination polymers by N–H···Cl bridges have also been observed in, e.g., pyridine-4-acetamide complexes, where a three-dimensional supramolecular framework exists (N···Cl, 333.4(3) and 324.7(4) pm) . π–π-stacking is reported for numerous other coordination polymers with benzotriazole derived ligands. − ,, …”

“…As a result, the copper atom displays a trigonal-bipyramidal coordination, where the two benzotriazolyl moieties define the axial positions (configuration index TBPY-5-33). The facile switch between the coordination numbers six and five is typical for copper­(II), and numerous five-coordinated complexes with nitrogen ligands occupying the axial sites have been described. − As in 2 – 4 , the neighboring coordination of an amide moiety and a halogenide ligand is probably supported by a S (6)-type intramolecular N1–H1···Br2 bridge (N1···Br2, 346(1) pm). Two CuBr 2 L fragments are consequently connected to a dimeric complex, featuring a centrosymmetric C 6 Cu 2 N 6 O 2 16-membered ring just like in 2 – 4 .…”

Synthesis of Bis(benzotriazol-1-yl)methane Derivatives by Cobalt-Catalyzed Formation of C-C Bonds

“…The disposition of the three rings is in such a way that the nitrogen atoms (if present) are as far as they can, in an anti-or pseudo trans conformation. A similar way occurs in bis(benzotriazol-1-yl)methane [51] and also in some pyrazolyl compounds such as bis(pyrazolyl)bipyridinylmethane [52], but quite different disposition was found in 2-[bis(3,5-diphenyl-1H-pyrazol-1-yl)methyl]pyridine [53] or in bis(benzotriazol-1-yl)methanethione [54], where the two nitrogen atoms in 2-position in both rings are pointing to each other. Figure 4 shows as both benzotriazolyl rings are in opposite direction, one of them with the benzene ring to the right and the other to the left.…”

“…The supramolecular structure does not contain the classical π,π-stacking between the rings in the molecule [51], probably because the above mentioned helical disposition around the central C(1) atom of the scorpionate molecule prevents such interactions. Instead, non-classical C-H···N hydrogen bond are found (parameters in Table 5).…”

Recent advances in the coordination chemistry of benzotriazole-based ligands

“…For this type of linkers, flexibility is typically introduced with the inclusion of alkyl chain spacer groups between the two benzotriazole units. Alkanes up to hexane have been a popular choice for these purposes, and several compounds have been reported with the respective ligands [121,[130][131][132][133][134][135][136][137][138][139]. It is worth noting that the use of all linkers in this category mostly produced CPs with low dimensionalities, particularly one-dimensional.…”