CuSiH31(C13N)4 crystallizes in the monoclinic C2/c space group. The structure consists of a CuSiH31(C13N)4 framework. Cu(1) is bonded in a rectangular see-saw-like geometry to one N(1), one N(2), one N(3), and one N(4) atom. The Cu(1)-N(1) bond length is 2.07 Å. The Cu(1)-N(2) bond length is 2.02 Å. The Cu(1)-N(3) bond length is 2.07 Å. The Cu(1)-N(4) bond length is 2.06 Å. Si(1) is bonded in a tetrahedral geometry to one C(1), one C(14), one C(27), and one C(40) atom. The Si(1)-C(1) bond length is 1.90 Å. The Si(1)-C(14) bond length is 1.89 Å. The Si(1)-C(27) bond length is 1.87 Å. The Si(1)-C(40) bond length is 1.88 Å. There are fifty-two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one Si(1), one C(2), and one C(6) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(6) bond length is 1.39 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(1) bond length is 0.95 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one H(2) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-H(2) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(7) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-C(7) bond length is 1.45 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(3) atom. The C(5)-H(3) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1) and one H(4) atom. The C(6)-H(4) bond length is 0.95 Å. In the seventh C site, C(7) is bonded in a linear geometry to one C(13) and one C(4) atom. The C(7)-C(13) bond length is 1.19 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(9), one N(1), and one H(5) atom. The C(8)-C(9) bond length is 1.41 Å. The C(8)-N(1) bond length is 1.33 Å. The C(8)-H(5) bond length is 0.95 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one H(6) atom. The C(9)-C(10) bond length is 1.40 Å. The C(9)-H(6) bond length is 0.95 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(9) atom. The C(10)-C(11) bond length is 1.38 Å. The C(10)-C(13) bond length is 1.49 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(10), one C(12), and one H(7) atom. The C(11)-C(12) bond length is 1.40 Å. The C(11)-H(7) bond length is 0.95 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(11), one N(1), and one H(8) atom. The C(12)-N(1) bond length is 1.32 Å. The C(12)-H(8) bond length is 0.95 Å. In the thirteenth C site, C(13) is bonded in a linear geometry to one C(10) and one C(7) atom. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one Si(1), one C(15), and one C(19) atom. The C(14)-C(15) bond length is 1.39 Å. The C(14)-C(19) bond length is 1.39 Å. In the fifteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(14), one C(16), and one H(9) atom. The C(15)-C(16) bond length is 1.39 Å. The C(15)-H(9) bond length is 0.95 Å. In the sixteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(15), one C(17), and one H(10) atom. The C(16)-C(17) bond length is 1.39 Å. The C(16)-H(10) bond length is 0.95 Å. In the seventeenth C site, C(17) is bonded in a trigonal planar geometry to one C(16), one C(18), and one C(20) atom. The C(17)-C(18) bond length is 1.39 Å. The C(17)-C(20) bond length is 1.44 Å. In the eighteenth C site, C(18) is bonded in a distorted single-bond geometry to one C(17) and one H(11) atom. The C(18)-H(11) bond length is 0.95 Å. In the nineteenth C site, C(19) is bonded in a distorted single-bond geometry to one C(14) and one H(12) atom. The C(19)-H(12) bond length is 0.95 Å. In the twentieth C site, C(20) is bonded in a linear geometry to one C(17) and one C(26) atom. The C(20)-C(26) bond length is 1.18 Å. In the twenty-first C site, C(21) is bonded in a distorted bent 120 degrees geometry to one C(22), one N(2), and one H(13) atom. The C(21)-C(22) bond length is 1.38 Å. The C(21)-N(2) bond length is 1.33 Å. The C(21)-H(13) bond length is 0.95 Å. In the twenty-second C site, C(22) is bonded in a distorted trigonal planar geometry to one C(21), one C(23), and one H(14) atom. The C(22)-C(23) bond length is 1.41 Å. The C(22)-H(14) bond length is 0.95 Å. In the twenty-third C site, C(23) is bonded in a trigonal planar geometry to one C(22), one C(24), and one C(26) atom. The C(23)-C(24) bond length is 1.41 Å. The C(23)-C(26) bond length is 1.49 Å. In the twenty-fourth C site, C(24) is bonded in a distorted single-bond geometry to one C(23), one C(25), and one H(15) atom. The C(24)-C(25) bond length is 1.42 Å. The C(24)-H(15) bond length is 0.95 Å. In the twenty-fifth C site, C(25) is bonded in a distorted bent 120 degrees geometry to one C(24), one N(2), and one H(16) atom. The C(25)-N(2) bond length is 1.32 Å. The C(25)-H(16) bond length is 0.95 Å. In the twenty-sixth C site, C(26) is bonded in a linear geometry to one C(20) and one C(23) atom. In the twenty-seventh C site, C(27) is bonded in a distorted trigonal planar geometry to one Si(1), one C(28), and one C(32) atom. The C(27)-C(28) bond length is 1.39 Å. The C(27)-C(32) bond length is 1.39 Å. In the twenty-eighth C site, C(28) is bonded in a distorted single-bond geometry to one C(27), one C(29), and one H(17) atom. The C(28)-C(29) bond length is 1.39 Å. The C(28)-H(17) bond length is 0.95 Å. In the twenty-ninth C site, C(29) is bonded in a distorted trigonal planar geometry to one C(28), one C(30), and one H(18) atom. The C(29)-C(30) bond length is 1.39 Å. The C(29)-H(18) bond length is 0.95 Å. In the thirtieth C site, C(30) is bonded in a trigonal planar geometry to one C(29), one C(31), and one C(33) atom. The C(30)-C(31) bond length is 1.39 Å. The C(30)-C(33) bond length is 1.47 Å. In the thirty-first C site, C(31) is bonded in a distorted trigonal planar geometry to one C(30), one C(32), and one H(19) atom. The C(31)-C(32) bond length is 1.39 Å. The C(31)-H(19) bond length is 0.95 Å. In the thirty-second C site, C(32) is bonded in a distorted single-bond geometry to one C(27), one C(31), and one H(20) atom. The C(32)-H(20) bond length is 0.95 Å. In the thirty-third C site, C(33) is bonded in a linear geometry to one C(30) and one C(39) atom. The C(33)-C(39) bond length is 1.18 Å. In the thirty-fourth C site, C(34) is bonded in a distorted bent 120 degrees geometry to one C(35), one N(3), and one H(21) atom. The C(34)-C(35) bond length is 1.42 Å. The C(34)-N(3) bond length is 1.33 Å. The C(34)-H(21) bond length is 0.95 Å. In the thirty-fifth C site, C(35) is bonded in a distorted trigonal planar geometry to one C(34), one C(36), and one H(22) atom. The C(35)-C(36) bond length is 1.40 Å. The C(35)-H(22) bond length is 0.95 Å. In the thirty-sixth C site, C(36) is bonded in a trigonal planar geometry to one C(35), one C(37), and one C(39) atom. The C(36)-C(37) bond length is 1.40 Å. The C(36)-C(39) bond length is 1.48 Å. In the thirty-seventh C site, C(37) is bonded in a distorted trigonal planar geometry to one C(36), one C(38), and one H(23) atom. The C(37)-C(38) bond length is 1.42 Å. The C(37)-H(23) bond length is 0.95 Å. In the thirty-eighth C site, C(38) is bonded in a distorted bent 120 degrees geometry to one C(37), one N(3), and one H(24) atom. The C(38)-N(3) bond length is 1.33 Å. The C(38)-H(24) bond length is 0.95 Å. In the thirty-ninth C site, C(39) is bonded in a linear geometry to one C(33) and one C(36) atom. In the fortieth C site, C(40) is bonded in a trigonal planar geometry to one Si(1), one C(41), and one C(45) atom. The C(40)-C(41) bond length is 1.39 Å. The C(40)-C(45) bond length is 1.39 Å. In the forty-first C site, C(41) is bonded in a distorted single-bond geometry to one C(40), one C(42), and one H(25) atom. The C(41)-C(42) bond length is 1.39 Å. The C(41)-H(25) bond length is 0.95 Å. In the forty-second C site, C(42) is bonded in a distorted trigonal planar geometry to one C(41), one C(43), and one H(26) atom. The C(42)-C(43) bond length is 1.39 Å. The C(42)-H(26) bond length is 0.95 Å. In the forty-third C site, C(43) is bonded in a trigonal planar geometry to one C(42), one C(44), and one C(46) atom. The C(43)-C(44) bond length is 1.39 Å. The C(43)-C(46) bond length is 1.45 Å. In the forty-fourth C site, C(44) is bonded in a distorted trigonal planar geometry to one C(43), one C(45), and one H(27) atom. The C(44)-C(45) bond length is 1.39 Å. The C(44)-H(27) bond length is 0.95 Å. In the forty-fifth C site, C(45) is bonded in a distorted single-bond geometry to one C(40), one C(44), and one H(28) atom. The C(45)-H(28) bond length is 0.95 Å. In the forty-sixth C site, C(46) is bonded in a linear geometry to one C(43) and one C(52) atom. The C(46)-C(52) bond length is 1.18 Å. In the forty-seventh C site, C(47) is bonded in a distorted bent 120 degrees geometry to one C(48), one N(4), and one H(29) atom. The C(47)-C(48) bond length is 1.41 Å. The C(47)-N(4) bond length is 1.30 Å. The C(47)-H(29) bond length is 0.95 Å. In the forty-eighth C site, C(48) is bonded in a distorted trigonal planar geometry to one C(47), one C(49), and one H(30) atom. The C(48)-C(49) bond length is 1.41 Å. The C(48)-H(30) bond length is 0.95 Å. In the forty-ninth C site, C(49) is bonded in a trigonal planar geometry to one C(48), one C(50), and one C(52) atom. The C(49)-C(50) bond length is 1.39 Å. The C(49)-C(52) bond length is 1.50 Å. In the fiftieth C site, C(50) is bonded in a bent 120 degrees geometry to one C(49) and one C(51) atom. The C(50)-C(51) bond length is 1.42 Å. In the fifty-first C site, C(51) is bonded in a distorted bent 120 degrees geometry to one C(50), one N(4), and one H(31) atom. The C(51)-N(4) bond length is 1.35 Å. The C(51)-H(31) bond length is 0.95 Å. In the fifty-second C site, C(52) is bonded in a linear geometry to one C(46) and one C(49) atom. There are four inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(12), and one C(8) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cu(1), one C(21), and one C(25) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Cu(1), one C(34), and one C(38) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Cu(1), one C(47), and one C(51) atom. There are thirty-one inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(8) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(9) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(11) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(12) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(15) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(16) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(18) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(19) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(21) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(22) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(24) atom. In the sixteenth H site, H(16) is bonded in a single-bond geometry to one C(25) atom. In the seventeenth H site, H(17) is bonded in a single-bond geometry to one C(28) atom. In the eighteenth H site, H(18) is bonded in a single-bond geometry to one C(29) atom. In the nineteenth H site, H(19) is bonded in a single-bond geometry to one C(31) atom. In the twentieth H site, H(20) is bonded in a single-bond geometry to one C(32) atom. In the twenty-first H site, H(21) is bonded in a single-bond geometry to one C(34) atom. In the twenty-second H site, H(22) is bonded in a single-bond geometry to one C(35) atom. In the twenty-third H site, H(23) is bonded in a single-bond geometry to one C(37) atom. In the twenty-fourth H site, H(24) is bonded in a single-bond geometry to one C(38) atom. In the twenty-fifth H site, H(25) is bonded in a single-bond geometry to one C(41) atom. In the twenty-sixth H site, H(26) is bonded in a single-bond geometry to one C(42) atom. In the twenty-seventh H site, H(27) is bonded in a single-bond geometry to one C(44) atom. In the twenty-eighth H site, H(28) is bonded in a single-bond geometry to one C(45) atom. In the twenty-ninth H site, H(29) is bonded in a single-bond geometry to one C(47) atom. In the thirtieth H site, H(30) is bonded in a single-bond geometry to one C(48) atom. In the thirty-first H site, H(31) is bonded in a single-bond geometry to one C(51) atom. Linkers: 8 C(#Cc1ccc([Si](c2ccc(C#Cc3ccncc3)cc2)(c2ccc(C#Cc3ccncc3)cc2)c2ccc(C#Cc3ccncc3)cc2)cc1)c1[c]cncc1. Metal clusters: 8 [Cu]. The MOF has largest included sphere 15.74 A, density 0.36 g/cm3, surface area 5551.27 m2/g, accessible volume 2.44 cm3/g