Volume 94 Issue 37 | p. 9 | Concentrates
Issue Date: September 19, 2016

A cozy carbon wrap for osmium

Ligand features an unprecedented five carbons bound to a metal, with the complexes showing promise as photothermal cancer therapy agents
Department: Science & Technology
News Channels: Organic SCENE
Keywords: chemical bonding, coordination complex, polydentate, chelate, osmium, phototherapy

In high-coordination-number metal complexes, the coordinating atoms on the ligand are most often heteroatoms, such as nitrogen, oxygen, or phosphorus. Carbon is typically not involved. A team including Congqing Zhu, Caixia Yang, Xin Lu, Gang Liu, and Haiping Xia of Xiamen University has turned that situation completely around by preparing an unprecedented pentadentate chelating ligand in which all five metal-binding atoms are carbons—a new record for planar carbon . . .

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