32
2 Biphenyl Moiety for a Solvent Responsive Aryl Gold(I) …
Fig. 2.11 Single-crystal structure of 3/none showing a the dimer arrangement, b the intermolecular
interactions between the dimers, c 1D column structure, and d and e the intermolecular interactions
between the columns. H atoms are omitted and gold atom is represented by yellow ball for clarity.
The inversion center is denoted as a purple square. In d and e, molecules in one column are colored
in light-blue and ones in its neighboring column are colored in light-green
The single-crystal structure of 3/CHCl 3 is quite different from those of the other
eleven single-crystal structures of 3 (Fig. 2.12). Molecules in 3/CHCl 3 form a dimer
structure through aurophilic interactions with Au···Au distances of 3.148, 3.278,
and 3.148 Å (Fig. 2.12a). The chiral configuration of two molecules in each dimer
is always the same; i.e., RR or SS. The dimers are isolated from neighboring ones
because of the presence of included CHCl 3 molecules (Fig. 2.12c). The determined
molar ratio of 3:CHCl 3 is 1:1. As shown in 12b, the distance of CH/π interactions
between a phenyl plane of 3 and an H atom of CHCl 3 is 2.177 Å. The isolation of
dimers through the rather strong CH/π interactions with solvent molecules is not
found in the other single crystals 3/solvent and 3/none; this explain why λ em,max of
3/CHCl 3 is at the shortest wavelength (λ em,max = 490 nm) of the complexes.
2 Biphenyl Moiety for a Solvent Responsive Aryl Gold(I) …
Fig. 2.11 Single-crystal structure of 3/none showing a the dimer arrangement, b the intermolecular
interactions between the dimers, c 1D column structure, and d and e the intermolecular interactions
between the columns. H atoms are omitted and gold atom is represented by yellow ball for clarity.
The inversion center is denoted as a purple square. In d and e, molecules in one column are colored
in light-blue and ones in its neighboring column are colored in light-green
The single-crystal structure of 3/CHCl 3 is quite different from those of the other
eleven single-crystal structures of 3 (Fig. 2.12). Molecules in 3/CHCl 3 form a dimer
structure through aurophilic interactions with Au···Au distances of 3.148, 3.278,
and 3.148 Å (Fig. 2.12a). The chiral configuration of two molecules in each dimer
is always the same; i.e., RR or SS. The dimers are isolated from neighboring ones
because of the presence of included CHCl 3 molecules (Fig. 2.12c). The determined
molar ratio of 3:CHCl 3 is 1:1. As shown in 12b, the distance of CH/π interactions
between a phenyl plane of 3 and an H atom of CHCl 3 is 2.177 Å. The isolation of
dimers through the rather strong CH/π interactions with solvent molecules is not
found in the other single crystals 3/solvent and 3/none; this explain why λ em,max of
3/CHCl 3 is at the shortest wavelength (λ em,max = 490 nm) of the complexes.