An energy efficient and facile synthesis of high molecular weight polyesters using ketenes
Martin Wolffs; Matthew J. Kade; Craig J. Hawker; Chem.Commun. 47 (2011) 10572–; doi:10.1039/c1cc14055h

data_7106879
_publ_section_title
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 An energy efficient and facile synthesis of high molecular weight
 polyesters using ketenes
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_journal_name_full               Chem.Commun.
_journal_page_first              10572
_journal_paper_doi               10.1039/c1cc14055h
_journal_volume                  47
_journal_year                    2011
_chemical_formula_sum            'C11 H13 O4'
_chemical_formula_weight         209.21
_chemical_name_systematic
;
?
;
_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                 110.965(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.089(3)
_cell_length_b                   10.451(3)
_cell_length_c                   12.182(4)
_cell_measurement_temperature    293(2)
_cell_volume                     1080.6(6)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'Omega scan'
_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  0.0283
_diffrn_reflns_av_sigmaI/netI    0.0248
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            8493
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.40
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.838
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.286
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             444
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.347
_refine_diff_density_min         -0.234
_refine_diff_density_rms         0.038
_refine_ls_extinction_coef       0.25(2)
_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   2.294
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     141
_refine_ls_number_reflns         2174
_refine_ls_number_restraints     8
_refine_ls_restrained_S_all      2.417
_refine_ls_R_factor_all          0.0853
_refine_ls_R_factor_gt           0.0602
_refine_ls_shift/su_max          0.044
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0400P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1604
_refine_ls_wR_factor_ref         0.1691
_reflns_number_gt                1500
_reflns_number_total             2174
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1cc14055h.txt
_cod_data_source_block           h080510
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'multi scan' changed to
'multi-scan' according to the built-in table from CIF Core dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7106879