The[Cu₂(O₂CMe)₄(H₂O)₂]/(py)₂CO System as the Source of an Unusual Heptanuclear Complex and a Novel Dodecanclear “Flywheel” Cluster

Self‐Assembly of High‐Nuclearity Copper Cages: Tricorne Cu21 and Saddlelike Cyclic Cu16

“…[10] Several other small cyclic copper cages with different characters have also been reported-for example, Cu 6 , [11] Cu 8 , [12] and Cu x (x = 6, 8, 9, 12, and 14) [13] -that encapsulate small molecules or anions in their central cavities. Another octanuclear copper cycle [Cu 8 A C H T U N G T R E N N U N G (m-dmpz) 8 8 ] (Hdmpz = 3,5-dimethylpyrazole) [14] shows catalytic activity in the oxidation of organic substrates, and other copper cages, such as the Cu 10 wheel [15] and Cu 12 "flywheel", [16] show antiferromagnetic properties. A 4 4 gridlike Cu 12 cage also displays interesting magnetic phenomena.…”

Heptanuclear hydroxo-bridged copper cluster of the dicubane-like type: structural and magnetic characterisations of [Cu7(OH)6Cl2(pn)6(H2 O)2](C(CN)3)4Cl2 (pn = 1,3-diaminopropane)

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A new polynuclear copper(II) complex [Cu 7 (OH) 6 Cl 2 -(pn) 6 (H 2 O) 2 ](C(CN) 3 ) 4 Cl 2 with hydroxo-bridging ligands has been prepared; the centrosymmetric cluster cation can be described as two Cu 4 O 3 Cl distorted cubane units sharing one copper cation.Various multinuclear copper(II) complexes have been reported in the last decade with a great number of simple and sophisticated bridging ligands; 1-5 however, some nuclearities remain comparatively scarce. In the case of tetranuclear complexes with Cu 4 O 4 cubane-like clusters some examples have been thoroughly described, 2 but to date little is known about clusters involving more than four metal centres.

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“…A new polynuclear copper(II) complex [Cu 7 (OH) 6 Cl 2 -(pn) 6 (H 2 O) 2 ](C(CN) 3 ) 4 Cl 2 with hydroxo-bridging ligands has been prepared; the centrosymmetric cluster cation can be described as two Cu 4 O 3 Cl distorted cubane units sharing one copper cation.…”

“…In the case of tetranuclear complexes with Cu 4 O 4 cubane-like clusters some examples have been thoroughly described, 2 but to date little is known about clusters involving more than four metal centres. 3,4 Concerning the heptanuclear copper(II) clusters, as far as we are aware, only one example of the dicubane-like type has been described. 5 Here we report the structure and preliminary magnetic studies of a novel vertex sharing dicubane-like heptanuclear copper(II) cluster [Cu 7 (OH) 6 Cl 2 (pn) 6 (H 2 O) 2 ]-(tcm) 4 Cl 2 (1) [pn = 1,3-diaminopropane; tcm 2 = C(CN) 3 2 = tricyanomethanide] with chloro-and hydroxo-bridging ligands.…”

“…To the resulting clear solution were immediately and consecutively added concentrated aqueous solutions of CuCl 2 ·2H 2 O (2 mmol) and potassium tricyanomethanide (8 mmol). Slow evaporation gave prismatic blue crystals of [Cu 7 (OH) 6 Cl 2 (pn) 6 (H 2 O) 2 ](tcm) 4 Cl 2 (yield 1.28 g, 42%) suitable for crystallography. ‡ The structure of 1 is unique and consists of a centrosymmetric hydroxo-bridged heptanuclear copper(II) cation (Fig.…”