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Cu
+
20
[Cu
2
(
20
)
2
]
2+
21
[Cu
3
(
21
)
2
]
3+
22
[Cu
4
(
22
)
2
]
4+
23
[Cu
5
(
23
)
2
]
5+
Figure 4.12 Self-recognition in helicate assembly from achiral ligands 20-23 according to
the maximum occupancy rule.
helicates when complexed with copper(I) ions (Figure 4.15). Interestingly, this self-
assembly process is not only selective in terms of self-recognition of the ligand strands, it
is also diastereoselective in terms of the fact that the stereochemistry of the ligand strand
completely controls the configuration of the newly formed stereogenic metal centres [32].
[Ga(acac)
3
]
KOH
24
-H
4
[Ga
2
(
24
)
3
]
6-
25
-H
4
[Ga
2
(
25
)
3
]
6-
26
-H
4
[Ga
2
(
26
)
3
]
6-
Figure 4.13 Self-recognition in helicate assembly from achiral ligands according to avoid
unfavourable steric stress due to linkers of different lengths.
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