Experimental and Computational Study of Unique Tetranuclear µ₃‐Chloride and µ‐Phenoxo/Chloro‐Bridged Defective Dicubane Cobalt(II) Clusters

Synthesis, structural determination, in vitro and in silico biological evaluation of divalent or trivalent cobalt complexes with indomethacin

“…A search of the literature regarding Cl-bridged cobalt complexes revealed the following: (i) one, two and three Cl-bridges between Co atoms have been reported, (ii) one Cl-bridge was reported in co-existence with other bridges based on O or N atoms [ [53] , [54] , [55] ], (iii) in the case of two [ [56] , [57] , [58] , [59] , [60] , [61] , [62] , [63] , [64] , [65] ] and three Cl-bridges [ [66] , [67] , [68] ], the compounds were di- [ [56] , [57] , [58] , [59] ], tri- [ 60 , 61 ] or poly-nuclear [ 62 , 63 ] and in few cases polymeric [ 64 , 65 ], (iv) in complexes having only Cl-bridges, the reported Co…Co separation distance was in the range 3.024–4.006 Å [ [66] , [67] , [68] ]. Considering all these data, we may suggest that the structure of complex 1 is among the rare cases containing the existence of a unique Cl-bridge between Co atoms and the reported Co…Co of 3.988 Å is within the range found for Cl-bridged cobalt atoms.…”

Tetranuclear Zinc and Cobalt Clusters with Dicubane‐Type Topology: Synthesis, Structures, Luminescent and Magnetic Properties

“…Complexes 1 and 2 join a family of tetranuclear clusters with a defective dicubane core. [36][37][38][39][40][41][42][43][44][45][46][47][48][49] A comparison of the bond lengths and angles of 1 and 2 with those previously reported similar dicubane-like clusters (Mn II , Fe II , Co II , Ni II , Cu II ) reveals that all the tetramers are centrosymmetric with similar values for the MÀ M distances and the MÀ O-M angles. [50][51][52][53] Luminescent properties of complex 1…”

[(VIVO)2MII5] (M = Ni, Co) Anderson wheels

“…The sign and magnitude of the exchange interactions in 1 and 2 are consistent with previous examples reported in the literature for both dialkoxo-and alkoxo/chloro-bridged M II 2 units, and alkoxo-bridged (VO)-M II moieties with similar bridging angles. 9, [20][21][22]…”