Abstract
Treatment of tetraphosphonitoresorcinarene [(CH 3) 2CHCH 2CHC 6H 2O 2PPh] 4 ( 1) with an excess [CuCl] powder in the presence of pyridine (py) yielded a tetracopper(I) phosphonitocavitand [pyH][ 1·Cu 4( μ-Cl) 4( μ 4-Cl)] ( 2). The Included μ 4-Cl in 2 was easily substituted by heavy halide anion to give [pyH][ 1·Cu 4( μ-Cl) 4( μ 4-X)] (X=Br, 3; I, 4). The complexes 2, 3, and 4 have been characterized by X-ray structure determinations. The similar structure contains four coplanar cupper atoms bridged by four μ-Cl and one central trapped μ 4-X atoms in the inside of the closing bowl-shaped cavitand. The third-order nonlinear optical properties of 2 as a typical metal-cavitand complex were investigated in this paper.
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