KC6H5(O3Cl)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 10-coordinate geometry to one H(3), one O(2), one O(3), one O(5), one O(6), two equivalent O(4), one Cl(2), and two equivalent Cl(1) atoms. The K(1)-H(3) bond length is 2.92 Å. The K(1)-O(2) bond length is 2.94 Å. The K(1)-O(3) bond length is 2.73 Å. The K(1)-O(5) bond length is 2.80 Å. The K(1)-O(6) bond length is 2.79 Å. There is one shorter (2.85 Å) and one longer (2.92 Å) K(1)-O(4) bond length. The K(1)-Cl(2) bond length is 3.62 Å. There is one shorter (3.31 Å) and one longer (3.45 Å) K(1)-Cl(1) bond length. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(6) and one O(1) atom. The C(1)-C(6) bond length is 1.38 Å. The C(1)-O(1) bond length is 1.32 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3) and one O(2) atom. The C(2)-C(3) bond length is 1.42 Å. The C(2)-O(2) bond length is 1.26 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one Cl(1) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-Cl(1) bond length is 1.72 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3) and one O(3) atom. The C(4)-O(3) bond length is 1.26 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(6) and one O(4) atom. The C(5)-C(6) bond length is 1.45 Å. The C(5)-O(4) bond length is 1.24 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(1), one C(5), and one Cl(2) atom. The C(6)-Cl(2) bond length is 1.72 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a bent 150 degrees geometry to one O(1) and one O(5) atom. The H(1)-O(1) bond length is 1.04 Å. The H(1)-O(5) bond length is 1.56 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(5) atom. The H(2)-O(5) bond length is 1.01 Å. In the third H site, H(3) is bonded in a single-bond geometry to one K(1) and one O(5) atom. The H(3)-O(5) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(6) atom. The H(4)-O(6) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(6) atom. The H(5)-O(6) bond length is 0.98 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one C(1) and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one K(1) and one C(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1) and one C(4) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(5) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one H(1), one H(2), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one K(1), one H(4), and one H(5) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a single-bond geometry to two equivalent K(1) and one C(3) atom. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one K(1) and one C(6) atom. Linkers: 4 O=C1[C](Cl)C(=O)C(O)=C(Cl)C1=O. Metal clusters: 4 [K]. The MOF has largest included sphere 1.43 A, density 1.98 g/cm3, surface area 2107.76 m2/g, accessible volume 0.03 cm3/g