KY2Cl7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), one Cl(7), and two equivalent Cl(1) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom to form a mixture of distorted face and edge-sharing YCl7 pentagonal bipyramids. In the second Y site, Y(2) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom to form a mixture of distorted face and edge-sharing YCl7 pentagonal bipyramids. There are seven inequivalent Cl sites. In the first Cl site, Cl(6) is bonded in a distorted T-shaped geometry to one K(1), one Y(1), and one Y(2) atom. In the second Cl site, Cl(7) is bonded in a trigonal non-coplanar geometry to one K(1), one Y(1), and one Y(2) atom. In the third Cl site, Cl(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Y(1), and one Y(2) atom. In the fourth Cl site, Cl(2) is bonded in a 3-coordinate geometry to one K(1), one Y(1), and one Y(2) atom. In the fifth Cl site, Cl(3) is bonded in a distorted L-shaped geometry to one K(1), one Y(1), and one Y(2) atom. In the sixth Cl site, Cl(4) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Y(1), and one Y(2) atom. In the seventh Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to one K(1), one Y(1), and one Y(2) atom.
KY2Cl7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), one Cl(7), and two equivalent Cl(1) atoms. The K(1)-Cl(2) bond length is 3.35 Å. The K(1)-Cl(3) bond length is 3.65 Å. The K(1)-Cl(4) bond length is 3.38 Å. The K(1)-Cl(5) bond length is 3.25 Å. The K(1)-Cl(6) bond length is 3.30 Å. The K(1)-Cl(7) bond length is 3.26 Å. There is one shorter (3.35 Å) and one longer (3.63 Å) K(1)-Cl(1) bond length. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom to form a mixture of distorted face and edge-sharing YCl7 pentagonal bipyramids. The Y(1)-Cl(1) bond length is 2.71 Å. The Y(1)-Cl(2) bond length is 2.78 Å. The Y(1)-Cl(3) bond length is 2.69 Å. The Y(1)-Cl(4) bond length is 2.70 Å. The Y(1)-Cl(5) bond length is 2.68 Å. The Y(1)-Cl(6) bond length is 2.72 Å. The Y(1)-Cl(7) bond length is 2.73 Å. In the second Y site, Y(2) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom to form a mixture of distorted face and edge-sharing YCl7 pentagonal bipyramids. The Y(2)-Cl(1) bond length is 2.72 Å. The Y(2)-Cl(2) bond length is 2.73 Å. The Y(2)-Cl(3) bond length is 2.71 Å. The Y(2)-Cl(4) bond length is 2.69 Å. The Y(2)-Cl(5) bond length is 2.72 Å. The Y(2)-Cl(6) bond length is 2.72 Å. The Y(2)-Cl(7) bond length is 2.68 Å. There are seven inequivalent Cl sites. In the first Cl site, Cl(6) is bonded in a distorted T-shaped geometry to one K(1), one Y(1), and one Y(2) atom. In the second Cl site, Cl(7) is bonded in a trigonal non-coplanar geometry to one K(1), one Y(1), and one Y(2) atom. In the third Cl site, Cl(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Y(1), and one Y(2) atom. In the fourth Cl site, Cl(2) is bonded in a 3-coordinate geometry to one K(1), one Y(1), and one Y(2) atom. In the fifth Cl site, Cl(3) is bonded in a distorted L-shaped geometry to one K(1), one Y(1), and one Y(2) atom. In the sixth Cl site, Cl(4) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Y(1), and one Y(2) atom. In the seventh Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to one K(1), one Y(1), and one Y(2) atom.