Mixed multilayers from aromatic (biphenyl) and aliphatic (octane) dithiols, using Cu(II) ions, have been prepared and characterized by ellipsometry, FTIR, and XPS. The data support the formation of multilayers in which interlayer disulfide linkages connect the 4,4‘-dimercaptobiphenyl layers and intralayer disulfide bonds connect 1,8-octanedithiol molecules. Cu(I) ions connect the aromatic and aliphatic layers.

10011.951 (4) and 1.963 (4) A with the longest value for the Co-N(3) bond. One of the amine protons bonded to N(3) is 2.48 A from chloride C1(2), perhaps contributing to the slightly longer Co-NO) bond length. None of the other coordinated amine nitrogens interacts with other atoms in the crystal structure. Dien N lengths in Co(en)(dien)C12÷ are 1.944 (7), 1.974 (7) and 1.993 (7)/~, giving an average Co--N length for this structure of 1.968 A compared with a value of 1.950 A for Co(bpy)(dien)C12+. The opposite pattern appears in the difference in Co-C1 lengths for the two structures. This bond is longer for the bpy structure with a value of 2.263 (2) A, compared with a value of 2.249 (3)A for zc-Co(en)(dien)C12+. Both values are within the range of other Corn-C1 lengths, however.The crystal structure of the complex consists of stacks of complex cations along the crystallographic c axis. The stacking interactions are created by the parallel orientation of planar bipyridine ligands of adjacent cations. Separations between atoms of adjacent bipyridine ligands are greater than 4 A. With the exception of the contact between the H atom of N(3) and C1(2), there are no interactions between the complex cation and the chloride ions and water molecules of the unit cell. Weak hydrogen bonds appear to exist between the hydrogen of water O(1) and chloride C1(3) and between water molecules 0(2) and 0(3). References