0022-4766/03/4406-1054 $25.00 © 2003 Plenum Publishing Corporation 1054 Journal of Structural Chemistry. Vol. 44, No. 6, pp. 1054-1061, 2003 Original Russian Text Copyright © 2003 by P. A. Stabnikov, I. A. Baidina, S. V. Sysoev, N. S. Vanina, N. B. Morozova, and SATURATED VAPOR PRESSURE AND CRYSTAL STRUCTURE OF BIS-(2-IMINO-4-PENTANONATO)COPPER(II) P. A. Stabnikov, I. A. Baidina, S. V. Sysoev, N. S. Vanina, N. B. Morozova, and I. K. Igumenov UDC 541.49+547.442 A comprehensive study of copper (II) bis-ketoiminate including tensimetric analysis of sublimation structure solution has been carried out. The temperature dependence of saturated vapor pressur Cu(ki) 2 crystals derived by the flow method is expressed by the equation lnP (atm) = 25.31 – 13750/T, 'H subl = –114.2r1.3 kJmole –1 , 'S subl = 210.2r3.0 Jmole –1 K –1 . Crystal data for CuO 2 N 2 C 10 H 16 : a = 15.143(3), b = 16.861(8), c = 13.795(32) Å, space group Ccca, Z = 12, d calc = 1.47 g/cm 3 , R = 0.029. The structure is molecular and consists of crystallographically independent Cu(ki) 2 complexes of two types, one with a cis structure and the other with a cis–trans disordering . The copper atom has a plane square environment o two oxygen and two nitrogen atoms. In the cis isomer , Cu–O 1.938 and Cu–N 1.895 Å; in the disordered complex, all four Cu–O(N) distances are 1.901 Å. Key words: vapor pressure, flow method, structure of copper (II) ketoiminate. Volatile coordination compounds of metals have found wide use in various analytical procedures and in separation and metalorganic chemical vapor deposition (MO CVD) processes. This group of compounds include diketonates and their nitrogen-containing analogs, ketoiminates. In contrast to E-diketonates, ketoiminat group substituted for one of the oxygen atoms. That is why in metallic coating processes, ketoiminates are pref contain less oxygen atoms. However, metal ketoiminates have received less attention than E-diketonate ketoiminate, trifluoroketoiminate, and pivalyltrifluoroketoiminate are mentioned in the context of the ge volatility studies for metal E-diketonates [1]. Details on the volatility of the three complexes are found in [2]. Th derivatographic study of Ni, Co, and Cu(II) ketoiminates are presented in [3]. Crystal data for Cu, Ni, and Pd(II are given in [4], which shows that the compounds are isostructural. Full structure solution for Ni(II) ketoiminat This work is a continuation of our systematic composition–structure–property studies of copper(II) comp E-diketones and ketoimines. We have studied the thermal properties and the crystal structure of copper(II) ket (CH 3 C(NH)CHC(O)CH 3 ) 2 ɋu, below Cu(ki) 2 . EXPERIMENTAL Cu(ki) 2 was synthesized by the reaction of copper acetate with ketoimine in aqueous alcohol in t excess ammonia using the procedures of [3, 6]. The dark precipitate formed in the reaction was filtered off, w water, and dried. The product was purified by sublimation in a vacuum gradient furnace: P = 10 –2 torr, T = 200qC. Chemical analysis data: calculated, %: C 46.2, H 6.2, N 10.8; found. %: C 46.1, H 6.4, N 10.8. A. V. Nikolaev Institute of Inorganic Chemistry, SiberianBranch, Russian Academy of Sciences; stabnik@che.nsk.su. Translated from Zhurnal Strukturnoi Khimii , Vol. 44, No. 6, pp. 1138-1145, Novem 2003. Original article submitted November 29, 2002.