A One-Dimensional Metallocyclophane with Columnar Aromatic Stacking: The Silver(I) eta(2)-Coordination Complex of 1,2-Benztriphenylene This work was partly supported by a Grant-in-Aid for Science Research (Nos. 11874092 and 12440189) and that in Priority Areas (No. 10149104, "Metal-Assembled Complexes") from the Ministry of Education, Science, Culture and Sports in Japan.