#------------------------------------------------------------------------------
#$Date: 2015-01-27 20:58:39 +0100 (Tue, 27 Jan 2015) $
#$Revision: 130149 $
#$URL: svn://www.crystallography.net/cod/cif/2/00/31/2003187.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_2003187
loop_
_publ_author_name
'Raffaella Puliti'
'Carlo Andrea Mattia'
_publ_section_title
;
N-Acetylglycyl-L-alaninamide and N-Acetyl-L-alanyl-L-alaninamide
;
_journal_name_full               'Acta Crystallographica C'
_journal_page_first              336
_journal_page_last               339
_journal_volume                  51
_journal_year                    1995
_chemical_formula_moiety         'C8 H15 N3 O3'
_chemical_formula_sum            'C8 H15 N3 O3'
_chemical_formula_weight         201.23
_space_group_IT_number           19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_type_scat_source           IntTabIV
_cell_angle_alpha                90.
_cell_angle_beta                 90.
_cell_angle_gamma                90.
_cell_formula_units_Z            4
_cell_length_a                   5.5005(4)
_cell_length_b                   9.429(1)
_cell_length_c                   20.712(2)
_cell_measurement_reflns_used    24
_cell_measurement_temperature    293
_cell_measurement_theta_max      26
_cell_measurement_theta_min      21
_cell_volume                     1074.2(3)
_diffrn_measurement_device       'Enraf-Nonius CAD-4F'
_diffrn_measurement_method       \w-2\q
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54056
_diffrn_reflns_av_R_equivalents  ?
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1314
_diffrn_reflns_theta_max         75
_diffrn_standards_decay_%        1
_diffrn_standards_interval_count ?
_diffrn_standards_interval_time  240
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.767
_exptl_absorpt_correction_T_max  ?
_exptl_absorpt_correction_T_min  ?
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.244
_exptl_crystal_density_meas      ?
_exptl_crystal_description       'flattened prism'
_exptl_crystal_size_max          0.66
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.04
_exptl_crystal_size_rad          ?
_refine_diff_density_max         0.15
_refine_diff_density_min         -0.15
_refine_ls_extinction_coef       2.1E-6(1)
_refine_ls_extinction_method     'Stout & Jensen (1968)'
_refine_ls_goodness_of_fit_obs   0.97
_refine_ls_hydrogen_treatment    refxyz
_refine_ls_number_parameters     173
_refine_ls_number_reflns         1237
_refine_ls_R_factor_obs          0.036
_refine_ls_shift/esd_max         0.10
_refine_ls_structure_factor_coef F
_refine_ls_weighting_scheme
; w = 1/[\s^2^(F~o~) + (0.01F~o~)^2^ + 1]
(Killean & Lawrence, 1969)
;
_refine_ls_wR_factor_obs         0.040
_reflns_number_observed          1237
_reflns_number_total             1314
_reflns_observed_criterion       I>=2.5\s(I)
_cod_database_code               2003187
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2-x,-y,1/2+z
-x,1/2+y,1/2-z
1/2+x,1/2-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_B_iso_or_equiv
O1 .4686(6) .2114(2) .23695(7) 6.33(6)
O2 .3700(4) .5564(1) .40379(7) 3.92(4)
O3 .4403(4) .5603(2) .06558(7) 4.07(4)
N1 .4670(4) .3581(2) .12206(8) 2.92(4)
N2 .4746(4) .4166(2) .29028(8) 3.06(4)
N3 .3755(5) .3494(2) .45757(8) 3.67(4)
C1 .3495(5) .4183(2) .17867(9) 3.31(5)
C2 .4387(5) .3402(2) .23807(9) 3.23(5)
C3 .5508(5) .3555(2) .35116(9) 3.01(4)
C4 .4222(4) .4292(2) .40623(9) 2.83(4)
C5 .5083(5) .4343(2) .06933(9) 3.01(4)
C6 .6416(6) .3672(3) .0148(1) 4.36(6)
C7 .8238(6) .3645(4) .3601(1) 5.60(7)
C8 .0751(6) .4110(4) .1739(1) 6.39(8)
H1 .519(6) .270(3) .125(1) 2.92
H2 .464(6) .510(3) .288(1) 3.06
H3 .282(6) .384(3) .492(1) 3.67
H4 .423(6) .258(3) .458(1) 3.67
H5 .419(6) .512(3) .183(1) 3.31
H6 .494(6) .260(3) .347(1) 3.01
H7 .543(6) .385(3) -.026(1) 4.36
H8 .807(6) .410(3) .011(1) 4.36
H9 .644(7) .272(4) .021(1) 4.36
H10 .882(7) .331(4) .401(2) 5.60
H11 .914(7) .319(4) .324(2) 5.60
H12 .880(7) .456(4) .355(2) 5.60
H13 -.004(7) .443(4) .210(2) 6.39
H14 .014(7) .455(4) .133(2) 6.39
H15 .033(7) .306(4) .174(2) 6.39