The calculated internal angles of the ketals (2ketals-[1.1][2]PCP, 2ketals-[1.1][3]PCP, 2ketals-[1.1][4]PCP) are 101.86°, 102.74°, and 104.10°, respectively, showing an increasing trend with macrocycle size that aligns well with single-crystal X-ray data.
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Macrocyclic geminal diols: synthesis, structures, stability and photophysical properties.
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