Design, synthesis and self-association behavior of water soluble self complementary facial amphiphiles
Isaacs, Lyle; Fettinger, James C.; Chemical Communications  (1999) 2549–; doi:10.1039/a907474k

data_7115218
_publ_contact_author
;
Lyle Isaacs
University of Maryland
Department of Chemistry and Biochemistry
College Park, MD 20742
;
_publ_section_title
;
 Design, synthesis and self-association behavior of water soluble self
 complementary facial amphiphiles
;
_journal_issue                   24
_journal_name_full               'Chemical Communications'
_journal_page_first              2549
_journal_paper_doi               10.1039/a907474k
_journal_year                    1999
_chemical_formula_sum            'C27.5 H27.5 N4 O6'
_chemical_formula_weight         510.04
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.050(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.973(2)
_cell_length_b                   14.284(3)
_cell_length_c                   19.986(4)
_cell_measurement_temperature    173(2)
_cell_volume                     4930.9(16)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0358
_diffrn_reflns_av_sigmaI/netI    0.0300
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            52308
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.85
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.9711
_exptl_absorpt_correction_T_min  0.9617
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Blessing (1995)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.374
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2148
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.310
_refine_diff_density_min         -0.299
_refine_diff_density_rms         0.049
_refine_ls_extinction_coef       0.0021(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     915
_refine_ls_number_reflns         11315
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0722
_refine_ls_R_factor_gt           0.0488
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0821P)^2^+1.2486P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1257
_refine_ls_wR_factor_ref         0.1455
_reflns_number_gt                8175
_reflns_number_total             11315
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            907474k.txt
_cod_data_source_block           b
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_cell_volume        4931.1(14)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_original_formula_sum        'C27.50 H27.50 N4 O6'
_cod_database_code               7115218