++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + XPREP - DATA PREPARATION & RECIPROCAL SPACE EXPLORATION Ver. 5.1/NT + + COPYRIGHT(c) 1997 Bruker Analytical X-ray Systems All Rights Reserved + + 06skc0078 started at 16:26:15 on 06-DEC-0 + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Original cell in Angstroms and degrees: 6.178 7.579 8.097 100.53 91.58 107.06 6086 Reflections read from file 06skc0078.hkl; mean (I/sigma) = 11.97 Lattice exceptions: P A B C I F Obv Rev All N (total) = 0 3043 3031 3026 3018 4550 4068 4038 6086 N (int>3sigma) = 0 2791 2769 2762 2728 4161 3706 3696 5567 Mean intensity = 0.0 335.2 301.3 319.8 315.3 318.8 318.0 309.9 314.7 Mean int/sigma = 0.0 12.0 12.0 12.0 11.8 12.0 12.0 12.0 12.0 Lattice type: P chosen Volume: 355.00 ------------------------------------------------------------------------------- DETERMINATION OF REDUCED (NIGGLI) CELL Transformation from original cell (HKLF-matrix): 1.0000 0.0000 0.0000 0.0000 1.0000 0.0000 0.0000 0.0000 1.0000 Unitcell: 6.178 7.579 8.097 100.53 91.58 107.06 Niggli form: a.a = 38.17 b.b = 57.44 c.c = 65.56 b.c = -11.21 a.c = -1.38 a.b = -13.74 ------------------------------------------------------------------------------- SEARCH FOR HIGHER METRIC SYMMETRY ------------------------------------------------------------------------------ Option A: FOM = 0.000 deg. TRICLINIC P-lattice R(int) = 0.039 [ 4456] Cell: 6.178 7.579 8.097 100.53 91.58 107.06 Volume: 355.00 Matrix: 1.0000 0.0000 0.0000 0.0000 1.0000 0.0000 0.0000 0.0000 1.0000 Option A selected ------------------------------------------------------------------------------- SPACE GROUP DETERMINATION Lattice exceptions: P A B C I F Obv Rev All N (total) = 0 3043 3031 3026 3018 4550 4068 4038 6086 N (int>3sigma) = 0 2791 2769 2762 2728 4161 3706 3696 5567 Mean intensity = 0.0 335.2 301.3 319.8 315.3 318.8 318.0 309.9 314.7 Mean int/sigma = 0.0 12.0 12.0 12.0 11.8 12.0 12.0 12.0 12.0 Crystal system A and Lattice type P selected Mean |E*E-1| = 0.726 [expected .968 centrosym and .736 non-centrosym] Chiral flag NOT set Systematic absences not required for triclinic Option Space Group No. Type Axes CSD R(int) N(eq) Syst. Abs. CFOM [A] P-1 # 2 centro 1 8646 0.039 4456 0.0 / 12.0 6.71 [B] P1 # 1 chiral 1 700 0.039 4456 0.0 / 12.0 0.99 Option [B] chosen ------------------------------------------------------------------------------- Determination of unit-cell contents Formula: C12H23O5N1 Formula weight = 261.31 Tentative Z (number of formula units/cell) = 1.0 giving rho = 1.222, non-H atomic volume = 19.7 and following cell contents and analysis: C 12.00 55.15 % H 23.00 8.87 % N 1.00 5.36 % O 5.00 30.61 % F(000) = 142.0 Mo-K(alpha) radiation Mu (mm-1) = 0.09 ------------------------------------------------------------------------------- File 06skc0078p1.ins set up as follows: TITL 06skc0078p1 in P1 CELL 0.71073 6.1782 7.5786 8.0969 100.526 91.585 107.060 ZERR 1.00 0.0003 0.0003 0.0003 0.002 0.002 0.002 LATT -1 SFAC C H N O UNIT 12 23 1 5 TEMP 0.04 TREF HKLF 4 END 6086 Reflections written to new reflection file 06skc0078p1.hkl -------------------------------------------------------------------------------