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Article

Erdmann’s Anion—An Inexpensive and Useful Species for the Crystallization of Illicit Drugs after Street Confiscations

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Carl A. Olson Memorial Laboratories, Department of Chemistry, Rutgers University, 73 Warren St., Newark, NJ 07102, USA
2
Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa
*
Author to whom correspondence should be addressed.
In Memorian: Howard D. Flack (1943–2017)—he, and his work, will be remembered.
Academic Editors: Katharina M. Fromm and Catherine Housecroft
Received: 9 March 2021 / Revised: 24 April 2021 / Accepted: 26 April 2021 / Published: 30 April 2021
Erdmann’s anion [1,6-diammino tetranitrocobaltate(III)] is useful in the isolation and crystallization of recently confiscated street drugs needing to be identified and catalogued. The protonated form of such drugs forms excellent crystals with that anion; moreover, Erdmann’s salts are considerably less expensive than the classically used AuCl4 anion to isolate them, while preparation of high-quality crystals is equally easy in both cases. We describe the preparation and structures of the K+CoH6N6O8 and NH4+CoH6N7O8, salts of Erdmann’s. In addition, herein are described the preparations of this anion’s salts with cocaine (C17H28CoN7O12), with methamphetamine (C10H22CoN7O8), and with methylone (C22H34CoN8O14), whose preparation and stereochemistry had been characterized by the old AuCl4 salts methodology. For all species in this report, the space groups and cell constants were determined at 296 and 100 K, looking for possible thermally induced polymorphism—none was found. Since the structures were essentially identical at the two temperatures studied, we discuss only the 100 K results. Complete spheres of data accessible to a Bruker ApexII diffractometer with Cu–Kα radiation, λ = 1.54178 Å, were recorded and used in the refinements. Using the refined single crystal structural data for the street drugs, we computed their X-ray powder diffraction patterns, which are beneficial as quick identification standards in law enforcement work. View Full-Text
Keywords: Flack test; Erdmann’s anion; bath salts; street drugs; cocaine; methamphetamine; methylone; π–π interactions; racemic mimics; kryptoracemic crystallization Flack test; Erdmann’s anion; bath salts; street drugs; cocaine; methamphetamine; methylone; π–π interactions; racemic mimics; kryptoracemic crystallization
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MDPI and ACS Style

Wood, M.R.; Mikhael, S.; Bernal, I.; Lalancette, R.A. Erdmann’s Anion—An Inexpensive and Useful Species for the Crystallization of Illicit Drugs after Street Confiscations. Chemistry 2021, 3, 598-611. https://0-doi-org.brum.beds.ac.uk/10.3390/chemistry3020042

AMA Style

Wood MR, Mikhael S, Bernal I, Lalancette RA. Erdmann’s Anion—An Inexpensive and Useful Species for the Crystallization of Illicit Drugs after Street Confiscations. Chemistry. 2021; 3(2):598-611. https://0-doi-org.brum.beds.ac.uk/10.3390/chemistry3020042

Chicago/Turabian Style

Wood, Matthew R., Sandra Mikhael, Ivan Bernal, and Roger A. Lalancette 2021. "Erdmann’s Anion—An Inexpensive and Useful Species for the Crystallization of Illicit Drugs after Street Confiscations" Chemistry 3, no. 2: 598-611. https://0-doi-org.brum.beds.ac.uk/10.3390/chemistry3020042

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