Ligand exchange in TREN-based cobalt (II) funnel complexes in the solid state

Nyssen, Nicolas; De Leener, Gaël; Luhmer, Michel; Colasson, Benoit; Jabin, Ivan; Višnjevac, Aleksandar; Reinaud, Olivia (2025) Ligand exchange in TREN-based cobalt (II) funnel complexes in the solid state. Journal of Molecular Structure, 1344 . ISSN 0022-2860

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Abstract

The coordination of CoII with two calixarene-based TREN [tris(2-aminoethyl)amine] ligands is reported. The two ligands differ for the presence of three anisole groups (in Calix-TRENMe) or three phenol groups (in Calix-TRENH) in the macrocyclic structure surrounding the CoIITREN core. Dicationic complexes [CoII(CH3CN)Calix-TRENMe][ClO4]2 and [CoII(CH3CN)Calix-TRENH][ClO4]2 were synthesized and fully chemically characterized. Surprisingly, a crystal-to-crystal transformation led to the substitution of the acetonitrile guest ligand in [CoII(CH3CN)Calix-TRENMe][ClO4]2 by a pair of H-bonded water molecules and formation of a new complex [CoII(OH2 center dot center dot center dot OH2)Calix-TRENMe][ClO4]2. This gave rise to the first example of an X-ray characterized aqua-complex with a CoII centre confined in a neutral, 5-coordinate N4(OH2) environment.

Item Type:	Article
Uncontrolled Keywords:	TREN; cobalt(II) complexes; funnel complexes; calix[6]arene; X-ray diffraction
Subjects:	NATURAL SCIENCES > Chemistry > Inorganic Chemistry
Divisions:	Division of Physical Chemistry
Projects:	Project title Project leader Project code Project type Biomimetički “funnel” i “bowl” supramolekularni sustavi za selektivno prepoznavanje DNA/RNA-CALIXDNA / CALIXDNA Aleksandar Višnjevac IP-2020-02-3786 HRZZ
Depositing User:	Ana Zečević
Date Deposited:	09 Apr 2026 08:24
URI:	http://fulir.irb.hr/id/eprint/11630
DOI:	10.1016/j.molstruc.2025.142970

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