Chemistry Letters, Vol.35, No.4, 430-431, 2006
Topological variation between hexa- and trithiacalix[6]arene-copper(II) complexes: From sphere to wheel by reducing the number of the sulfur bridges
Contrary to hexathiacalix [6] arene (H6L6S) forming [Cu-10(L-6S)(2)]-type spherical decacopper(II) complex, trithiacalix[6]arene (H6L3S), in which three sulfur bridges of H6L6S are replaced with methylenes in an alternate manner, affords nanosized wheel-shaped octanuclear complex [Cu-8(H2L3S)(4)] consisting of four [Cu2H2L3S] units.