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The incidence of kryptoracemic crystallization in [CoIII(tren)XY]+ compounds: The case of cis-[CoIII(tren)Cl2]Cl·H2O Mikhael, Mina Hanna, Mary Halaka, Evana Bernal, Ivan Lalancette, Roger Flack parameter Kryptoracemates Metal compounds Molecular overlays Molecular conformations Tris(2-aminoethylamine) ligand We are evaluating the proposition that compounds with pronounced tendencies to crystallize as kryptoracemates contain molecular fragments responsible for such a property. Why Sohncke space groups display such a tendency is not currently known, but one such fragment is the [tris(2-aminoethyl)amine-N,N',N'',N'''] ligand when attached to cobalt(III). Therefore, proceeding to test the concept further, we examined the title compound and found a previously unknown kryptoracemic species, described in what follows. It seems then that the prescription has some merit and should be examined further inasmuch as guidelines for the occurrence of kryptoracemic crystallization are scant, if any exist. Crystal data for C6H20Cl3CoN4O: monoclinic, space group P21 (no. 4), a = 7.6672(3) Å, b = 15.7153(5) Å, c = 10.7170(4) Å, β = 92.964(2)°, V = 1289.59(8) Å3, Z = 4, T = 100(2) K, μ(CuKα) = 16.026 mm-1, Dcalc = 1.697 g/cm3, 13406 reflections measured (8.26° ≤ 2Θ ≤ 133.402°), 3976 unique (Rint = 0.0300, Rsigma = 0.0519) which were used in all calculations. The final R1 was 0.0220 (I > 2σ(I)) and wR2 was 0.0459 (all data). Atlanta Publishing House LLC 2020-12-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/plain https://www.eurjchem.com/index.php/eurjchem/article/view/2022 10.5155/eurjchem.11.4.314-318.2022 European Journal of Chemistry; Vol. 11 No. 4 (2020): December 2020; 314-318 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/2022/pdf_2022 https://www.eurjchem.com/index.php/eurjchem/article/view/2022/2651 Copyright (c) 2020 Authors