A molecular trefoil knot, constructed around two copper(I) centres used as template (see figure), has been synthesized in 29 % yield by the use of 1,3-phenylene spacers between the phenanthroline subunits. Resolution has been achieved and the absolute configuration is given on the basis of an X-ray diffraction study.
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Dietrich‐Buchecker et al. (1999) studied this question.
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