Nitrato and Acetylacetonato Complexes of Copper(I)

• Published in: Canadian journal of chemistry 1971-03, Vol.49 (5), p.761-766
• Main Authors: Anderson, W. A, Carty, A. J, Palenik, G. J, Schreiber, G
• Format: Article
• Language: English
• ISSN: 0008-4042; 1480-3291
• DOI: 10.1139/v71-127

Copper(I) nitrate complexes of the types L 2 CuNO 3 , L 3 CuNO 3 , and L 4 CuNO 3 (L = tertiary phosphine) have been synthesized by reduction of copper(II) nitrate with tertiary phosphines. Infrared spectra and single crystal X-ray measurements indicate the presence of bidentate nitrate in L 2 CuNO 3 , monodentate nitrate in L 3 CuNO 3 , and ionic nitrate in L 4 CuNO 3 .The single crystal X-ray structure of nitratobis (tricyclohexylphosphine)copper(I) is reported. CuO 3 N(PC 18 H 33 ) 2 crystallizes in the monoclinic space group C2/c with a = 18.18(1) Å, b = 9.240(6) Å, c = 22.41(2) Å, and β = 96.57(5)°. The structure was solved by the heavy atom method and refined with isotropic thermal parameters to an R of 0.14. The copper atom is tetrahedrally coordinated by two phosphorus atoms and two oxygen atoms of a bidentate nitrate group. The PCuP angle (140(1)°) and CuP bond lengths (2.29(1) Å) are the largest reported for tetrahedral copper complexes.A facile synthetic route to acetylacetonatobis(phosphine)copper(I) complexes is also described.