The crystal structure described by K2Ni(CO5)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Ni(1) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(4), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one Ni(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Ni(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent K(1), one Ni(1), and one C(1) atom. is represented by the CIF file [CIF]
data_K2Ni(CO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.242
_cell_length_b   6.961
_cell_length_c   11.388
_cell_angle_alpha   68.670
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   460.917
_cell_formula_units_Z   2
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
  K  K0  1  0.341  0.722  0.340  1.0
  K  K1  1  0.659  0.278  0.660  1.0
  K  K2  1  0.841  0.278  0.160  1.0
  K  K3  1  0.159  0.722  0.840  1.0
  Ni  Ni4  1  0.000  0.000  0.500  1.0
  Ni  Ni5  1  0.500  0.000  0.000  1.0
  C  C6  1  0.828  0.772  0.166  1.0
  C  C7  1  0.172  0.228  0.834  1.0
  C  C8  1  0.328  0.228  0.334  1.0
  C  C9  1  0.672  0.772  0.666  1.0
  O  O10  1  0.947  0.662  0.249  1.0
  O  O11  1  0.053  0.338  0.751  1.0
  O  O12  1  0.447  0.338  0.251  1.0
  O  O13  1  0.553  0.662  0.749  1.0
  O  O14  1  0.761  0.878  0.444  1.0
  O  O15  1  0.239  0.122  0.556  1.0
  O  O16  1  0.261  0.122  0.056  1.0
  O  O17  1  0.739  0.878  0.944  1.0
  O  O18  1  0.332  0.785  0.066  1.0
  O  O19  1  0.668  0.215  0.934  1.0
  O  O20  1  0.832  0.215  0.434  1.0
  O  O21  1  0.168  0.785  0.566  1.0
  O  O22  1  0.861  0.745  0.047  1.0
  O  O23  1  0.139  0.255  0.953  1.0
  O  O24  1  0.361  0.255  0.453  1.0
  O  O25  1  0.639  0.745  0.547  1.0
  O  O26  1  0.684  0.901  0.166  1.0
  O  O27  1  0.316  0.099  0.834  1.0
  O  O28  1  0.184  0.099  0.334  1.0
  O  O29  1  0.816  0.901  0.666  1.0
[/CIF]
.
The crystal structure described by K2Ni(CO5)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Ni(1) is bonded in an octahedral geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(4), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one Ni(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Ni(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent K(1), one Ni(1), and one C(1) atom. is represented by the CIF file [CIF]
data_K2Ni(CO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.242
_cell_length_b   6.961
_cell_length_c   11.388
_cell_angle_alpha   68.670
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   460.917
_cell_formula_units_Z   2
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
  K  K0  1  0.341  0.722  0.340  1.0
  K  K1  1  0.659  0.278  0.660  1.0
  K  K2  1  0.841  0.278  0.160  1.0
  K  K3  1  0.159  0.722  0.840  1.0
  Ni  Ni4  1  0.000  0.000  0.500  1.0
  Ni  Ni5  1  0.500  0.000  0.000  1.0
  C  C6  1  0.828  0.772  0.166  1.0
  C  C7  1  0.172  0.228  0.834  1.0
  C  C8  1  0.328  0.228  0.334  1.0
  C  C9  1  0.672  0.772  0.666  1.0
  O  O10  1  0.947  0.662  0.249  1.0
  O  O11  1  0.053  0.338  0.751  1.0
  O  O12  1  0.447  0.338  0.251  1.0
  O  O13  1  0.553  0.662  0.749  1.0
  O  O14  1  0.761  0.878  0.444  1.0
  O  O15  1  0.239  0.122  0.556  1.0
  O  O16  1  0.261  0.122  0.056  1.0
  O  O17  1  0.739  0.878  0.944  1.0
  O  O18  1  0.332  0.785  0.066  1.0
  O  O19  1  0.668  0.215  0.934  1.0
  O  O20  1  0.832  0.215  0.434  1.0
  O  O21  1  0.168  0.785  0.566  1.0
  O  O22  1  0.861  0.745  0.047  1.0
  O  O23  1  0.139  0.255  0.953  1.0
  O  O24  1  0.361  0.255  0.453  1.0
  O  O25  1  0.639  0.745  0.547  1.0
  O  O26  1  0.684  0.901  0.166  1.0
  O  O27  1  0.316  0.099  0.834  1.0
  O  O28  1  0.184  0.099  0.334  1.0
  O  O29  1  0.816  0.901  0.666  1.0
[/CIF]
.