Main-Chain Calix[4]arene Elastomers by Ring-Opening Metathesis Polymerization
Yang, Yong; Swager, Timothy M.; Macromolecules 40 (2007) 7437–; doi:10.1021/ma071304+

data_1516651
_publ_section_title
;
 Main-Chain Calix[4]arene Elastomers by Ring-Opening Metathesis
 Polymerization
;
_journal_issue                   21
_journal_name_full               Macromolecules
_journal_page_first              7437
_journal_paper_doi               10.1021/ma071304+
_journal_volume                  40
_journal_year                    2007
_chemical_formula_sum            'C86.5 H118 O4'
_chemical_formula_weight         1221.81
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                82.483(2)
_cell_angle_beta                 88.559(2)
_cell_angle_gamma                65.0160(10)
_cell_formula_units_Z            2
_cell_length_a                   14.9565(8)
_cell_length_b                   15.7696(9)
_cell_length_c                   17.7243(10)
_cell_measurement_reflns_used    7637
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      0.00
_cell_measurement_theta_min      0.00
_cell_volume                     3754.6(4)
_computing_cell_refinement       'SAINT 5 (Bruker-AXS, 2003)'
_computing_data_collection       'SMART 5 (Bruker-AXS, 2003)'
_computing_data_reduction        'SAINT 5 (Bruker-AXS, 2003)'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker Smart APEX CCD'
_diffrn_measurement_method       'omega and phi 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  0.0298
_diffrn_reflns_av_sigmaI/netI    0.0318
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            79633
_diffrn_reflns_theta_full        29.13
_diffrn_reflns_theta_max         29.13
_diffrn_reflns_theta_min         1.44
_exptl_absorpt_coefficient_mu    0.064
_exptl_absorpt_correction_T_max  0.9873
_exptl_absorpt_correction_T_min  0.9749
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.081
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1338
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.158
_refine_diff_density_min         -0.708
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1208
_refine_ls_number_reflns         20173
_refine_ls_number_restraints     2481
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.1019
_refine_ls_R_factor_gt           0.0719
_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^)+(0.1163P)^2^+2.6818P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2027
_refine_ls_wR_factor_ref         0.2306
_reflns_number_gt                14186
_reflns_number_total             20173
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ma071304%2Bsi20070612_035856.cif
_cod_data_source_block           06068
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/ACS/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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P-1
_cod_original_formula_sum        'C86.50 H118 O4'
_cod_database_code               1516651