data_Er2C(NO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.69
_cell_length_b   3.69
_cell_length_c   8.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Er2C(NO)2
_chemical_formula_sum   'Er2 C1 N2 O2'
_cell_volume   96.28
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Er  Er0  1  0.85  0.07  0.64  1.0
  Er  Er1  1  0.0  0.13  0.52  1.0
  C  C2  1  0.0  0.0  0.0  1.0
  N  N3  1  0.0  0.0  0.24  1.0
  N  N4  1  0.0  0.0  0.92  1.0
  O  O5  1  0.0  0.13  0.24  1.0
  O  O6  1  0.85  0.07  0.92  1.0

data_Er2C(NO)2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.69
_cell_length_b   3.69
_cell_length_c   8.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Er2C(NO)2
_chemical_formula_sum   'Er2 C1 N2 O2'
_cell_volume   96.28
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Er  Er0  1  0.0  0.13  0.52  1.0
  Er  Er1  1  0.85  0.07  0.64  1.0
  C  C2  1  0.0  0.0  0.0  1.0
  N  N3  1  0.0  0.0  0.24  1.0
  N  N4  1  0.0  0.0  0.92  1.0
  O  O5  1  0.0  0.13  0.24  1.0
  O  O6  1  0.85  0.07  0.92  1.0

Er Er C N N O O
Er2C(NO)2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Er2C(NO)2 cluster. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 3-coordinate geometry to one Er(2), one N(2), and one O(2) atom. The Er(1)-Er(2) bond length is 1.12 Å. The Er(1)-N(2) bond length is 2.42 Å. The Er(1)-O(2) bond length is 2.26 Å. In the second Er site, Er(2) is bonded in a 3-coordinate geometry to one Er(1), one N(1), and one O(1) atom. The Er(2)-N(1) bond length is 2.36 Å. The Er(2)-O(1) bond length is 2.26 Å. C(1) is bonded in a distorted single-bond geometry to one N(2) and one O(2) atom. The C(1)-N(2) bond length is 0.62 Å. The C(1)-O(2) bond length is 0.98 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a single-bond geometry to one Er(2) and one O(1) atom. The N(1)-O(1) bond length is 0.49 Å. In the second N site, N(2) is bonded in an L-shaped geometry to one Er(1), one C(1), and one O(2) atom. The N(2)-O(2) bond length is 0.72 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Er(2) and one N(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Er(1), one C(1), and one N(2) atom.