Synthesis and crystal structure of (2.2.2-cryptand)potassium N-benzoyldiisopropylphosphoramidate monohydrate |
| |
Authors: | A N Chekhlov |
| |
Institution: | (1) Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia |
| |
Abstract: | A new complex, (2.2.2-cryptand)potassium N-benzoyldiisopropylphosphoramidate monohydrate K(Crypt-222)]+ · (iso-PrO)2P(O)N−C(O)Ph · H2O (I), was synthesized. Its crystal structure was studied by X-ray diffraction analysis: space group P
, a = 11.804 ?, b = 12.043 ?, c = 15.607 ?, α = 87.29°, β = 84.59°, γ = 61.32°, Z = 2. The triclinic structure of I was solved by direct methods and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.052 for all 5410 independent reflections (CAD-4 automated diffractometer, λMoK
α). In structure I, the host-guest K(Crypt-222)]+ complex cation has approximate D
3 symmetry. Its K+ cation is coordinated by all the eight (6O + 6N) heteroatoms of the cryptand ligand. The coordination polyhedron of K+ (CN = 8) is a dicapped trigonal prism slightly distorted toward an antiprism. In the phosphoramidate anion (with the deprotonated
nitrogen atom), eight non-hydrogen atoms of two terminal iso-PrO substituents are disordered each over two positions: main and low-occupancy positions. The water molecule in complex
I is disordered, and its H atoms form hydrogen bonds.
Original Russian Text ? A.N. Chekhlov, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 2, pp. 331–337. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|