Trigonal to tetrahedral transitions in Cu^I six-membered inorganic true heterocycles

GRAPHICAL ABSTRACT

ABSTRACT

A series of six-membered Cu^I true heterocycles was prepared by reactions of Cu(PPh₃)₂NO₃ with deprotonated R₂P(S)-NH-C(O)R' (R' = (CH₂)₃CH₃, C₆H₅, C₆H₄F, C₆H₄Cl; R = Ph, OPh) ligands. The synthesized compounds were characterized by ³¹P NMR spectroscopy and single crystal X-ray diffraction. According to quantum chemical calculations, most of the true Cu^I heterocycles with the P-N-C ligands should be tetrahedral. However, an exceptional trigonal complex was observed upon crystallization.

KEYWORDS:

• Cu^I coordination
• P-N-C ligands
• true heterocycles

Acknowledgments

The authors acknowledge^{Table 1Figure 4Table 2Figure 3} Michal Babiak and X-Ray Diffraction and Bio-SAXS Core Facility, CEITEC MU for X-Ray measurements (CZ.1.05/1.1.00/02.0068).