Table 9.

Occurrence of linear E–X–Y CT fragments crystallographically characterized from a search of the Cambridge Structural Database (number of crystal structures in parentheses).

^(a)Only contacts. References [476–483].

^(b)References [42, 444, 466, 484–498].

^(c)References [47, 69, 108, 463, 464, 474, 490, 493, 496, 499–549].

^(d)References [30, 42, 148]. ^(e)References [25, 47, 69, 510, 550–554].

^(f)References [148, 555, 556]. ^(g)References [510, 553–555].

^(h)Only contacts. References [480, 557, 558].

⁽ⁱ⁾Only the structure of [559] is a CT adduct.

References [50, 559–561].

^(j)Only two structures are of the CT type.

References [45, 63, 475, 532, 562–564].

^(k)Only contacts. References [360, 483, 565].