Synthesis, structure, and preliminary magnetic studies of unprecedented hexacopper(ii) barrel clusters with spin ground state S = 3

Aggregation of [Cu${{\bf }{{{\bf II}\hfill \atop \bf 4\hfill}}}$] Building Blocks into [Cu${{\bf }{{{\bf II}\hfill \atop \bf 8\hfill}}}$] Clusters or a [Cu${{\bf }{{{\bf II}\hfill \atop \bf 4\hfill}}}$]∞ Chain through Subtle Chemical Control

“…A few coordination polymers of Cu II clusters have been reported in the literature over the years, but the number of such species remains small. [22][23][24][25] [Cu 8 (L) 2 (OMe) 8 Figure 5) is structurally related to 2 in that it consists of almost identical octanuclear [Cu 8 L 2 (OMe) 8 ] 2 + aggregates linked by counterions. In 3, the connection between clusters takes place with Cl À ligands through coordination to copper with Cu-Cl-Cu angles of 127.28(6)8.…”

Trinuclear and tetranuclear adduct formation between sodium perchlorate and copper(II) complexes of salicylaldimine type ligands: Structural characterization and theoretical investigation

“…Crown ethers, cryptands, and related ligands are the most important class of complexing agents for the alkali-metal ions and consequently structure/selectivity studies of the alkalimetal ions usually focus on such systems [1][2][3]. Besides these important classes of complexing agents, there are many other simpler and more affordable ligands that are also effective in this respect.…”

A heteronuclear [nickel(II)–sodium] infinite chain complex derived from 3-{[(2-diethylamino-ethyl)-methyl-amino]-methyl}-2-hydroxy-5-methyl-benzaldehyde

“…Other heteronuclear complexes incorporating transition metal ions with Na cations in the same complex have been prepared by Winpenny and co-workers, who made Ni(II)/Na supramolecular clusters [2,3] and a hexa-copper(II) unit assembled around a central Na cation [4], and the group of Liu [5], who reported a Mn 2 Na aggregate complex. The proligand HL [6] (150 mg, 0.540 mmol) and Ni(OAc) 2 Á 4H 2 O (269 mg, 1.080 mmol) were refluxed together in methanol (20 cm 3 ) for 30 min, NaBPh 4 (395 mg, 1.080 mmol) was added and the resulting solution allowed to cool to r.t. giving green crystals suitable for X-ray structure determination.…”

“…Other heteronuclear complexes incorporating transition metal ions with Na cations in the same complex have been prepared by Winpenny and co-workers, who made Ni(II)/Na supramolecular clusters [2,3] and a hexa-copper(II) unit assembled around a central Na cation [4], and the group of Liu [5], who reported a Mn 2 Na aggregate complex.…”