Carbide chlorides are mixed anion compounds containing chloride anions and anions consisting entirely of carbon. In these compounds there is no bond between chlorine and carbon. But there is a bond between a metal and carbon. Many of these compounds are cluster compounds, in which metal atoms encase a carbon core, with chlorine atoms surrounding the cluster. The chlorine may be shared between clusters to form polymers or layers. Most carbide chloride compounds contain rare earth elements. Some are known from group 4 elements. The hexatungsten carbon cluster can be oxidised and reduced, and so have different numbers of chlorine atoms included.
The carbide chlorides are a subset of the halide carbides, with related compounds including the carbide bromides, and carbide iodides. Cluster compounds similar to these carbides, may instead replace carbon with boron, hydrogen, nitrogen or phosphorus.
List formulasystemspace groupunit cellvolumedensitycommentreferenceCa3C3Cl2orthorhombicCmcma=3.876, b=13.524, c=11.6532.47redSc2CCl2Pm1a=3.39977 c=8.8583.24blackSc5CCl8monoclinicC12/m1a=17.8 b=3.5259 c=12.052 β=130.112.99Sc7C2Cl10monoclinicC12/m1a=18.62 b=11.81 β=99.813.04ruby red; moisture sensitiveTi6CCl14orthorhombicCmcea=12.4592 b=12.2458 c=10.95762.93blackYCClC12/m1a=6.82 b=3.713 c=9.327 β=94.753.85Y2C0.7Cl2Pm1a=3.7022 c=9.1953.91silvery greyZr6CCl14orthorhombicCmcea=14.091 b=12.595 c=11.5063.43brown redKZr6CCl15orthorhombicPnmaa=18.489 b=13.909 c=9.690 Z=42492dark red; Zr6C clustersRb4Zr6CCl18C2/ma=10.460 b=17.239 c=9.721 β=115.05 Z=2Rb[(Zr6C)Cl15]orthorhombicPnmaa=18.484,b= 18.962,c=9.708 Z= 42505.43.12dark red-brownCs4[Sc6C]Cl13tetragonalI41/amda = 15.405, c = 10.179 Z=4green blackCs[(Zr6C)Cl15]orthorhombicPnmaa = 18.513 b = 13.916 c = 9.6383 Z=42483.1dark redLa2CClRma=3.878 c=16.915.74coppery redLa2C2ClmonoclinicC12/c1a=14.77 b=4.187 c=6.802 β=101.55.44goldLa3C3Cl2monoclinicC12/c1a=7.771 b=12.962 c=6.91 β=104.35.16goldLa4C2Cl5orthorhombicImmma=3.92 b=7.945 c=19.2974.67blackLa4C5Cl2monoclinicC12/m1a=22.57 b=3.91 c=1.019 β=95.695.07goldLa5C2Cl9triclinicPa=8.645 b=8.706 c=11.925 α=84.97° β=85.78° γ=61.31°4.40redLa6(C2)3Cl4monoclinicP21/ca = 7.770, b = 12.962, c = 6.910 and β = 104.30° Z=2674.45.158gold; sheets of octahedraLa8C8Cl5monoclinicP121/c1a=7.756 b=16.951 c=6.878 β=104.25.24goldLa8(C2)5Cl4monoclinicC2/ma = 22.570, b = 3.9300, c = 10.190 β = 95.69° Z=2899.45.071goldLa11C11Cl7monoclinicP121/c1a=7.77 b=47.038 c=6.901 β=104.285.19goldLa14C14Cl9monoclinicP1C1a=7.775 b=2.9963 c=6.895 β=104.215.19goldLa20C20Cl13monoclinicP121/c1a=7.762 b=42.941 c=6.903 β=104.265.18blackLa36C36Cl23monoclinicP121/c1a=7.764 b=77.055 c=6.897 β=104.265.18greyK[La5(C2)]Cl10monoclinicP21/ca=8.5632, b=15.074, 17.115 β=119.74 Z=4 1918.33.85light redCe2C2ClmonoclinicC12/c1a=14.573, b=4.129, c=6.696, β=101.375.71goldCe2(C2)2ClmonoclinicC2/ca = 14.573, b = 4.129, c = 6.696, β = 101.37 °Ce3CCl5monoclinicC12/c1a=13.899, b=8.71, c=15.765, β=98.224.29orangeCe4CCl8monoclinicP1C1a=13.538, b=10.487, c=22.845, β=126.314.35blackCe5C2Cl9triclinicPa=8.57, b=8.627, c=11.869, α=84.8, β=85.5, γ=61.29redCe6Cl10C2monoclinicC12/c1a= 13.899,b= 8.710,c= 15.765,β= 98.22° Z=41888.9Ce8C8Cl5monoclinicP121/c1a=7.669, b=16.784, c=6.798, β=104.055.46goldCe18(C2)9Cl11triclinicPa = 6.771, b = 7.657, c = 18.98,α = 88.90 °, β = 80.32 °, γ = 76.09 °Ce26(C2)13Cl16monoclinicP21/ca = 7.664, b = 54.25, c = 6.796, β = 103.98 °K[Ce5(C2)]Cl10monoclinicP21/ca=8.4739, b=15.017, c=1639 β=119.76 Z=41871.23.97redPr3CCl5monoclinicC12/c1a=13.867 b=8.638 c=15.69 β=97.674.37yellowPr4C2Cl5orthorhombicImmma=3.848 b=7.759 c=17.015.00blackPr5C2Cl9triclinicPa=8.526 b=8.592 c=11.821 α=84.77 β=85.42 γ=61.264.61brown redPr6C2Cl10monoclinicC2/ca = 13.687, b = 8.638, c = 15.690, β = 97.67°yellow to greenPr8C8Cl5monoclinicC121/c1a=7.617 b=16.689 c=6.769 β=103.945.57goldPr11C11Cl7monoclinicP121/c1a=7.612 b=6.127 c=6.761 β=103.925.56goldPr14C14Cl9monoclinicP1c1a=7.611 b=29.392 c=6.764 β=103.95.56goldK{Pr5(C2)}Cl10hexagonalP63/ma=8.426 c=14.894 Z=2915.9dark redRb{Pr5(C2)}Cl10hexagonalP63/ma=8.4499, c=14.976 Z=29264.19red; trigonal bipyrmamid of Pr containing a C2 unitRb[Nd5(C2)]Cl10hexagonala=08.398, c=14.88 4.33dark redGd2C2ClPma=3.6902, c=20.308Gd2C2Cl2monoclinicPm1a=3.7633, c=9.45935.69black; contains C24−Gd3CCl3cubicI4132a=10.7346.34Gd4C2Cl3orthorhombicPnmaa=10.596, b=3.684, c=19.6276.58bronzeGd5C2Cl9monoclinicP121/c1a=9.182, b=16.12, c=12.886, β=119.864.54blackGd5C6Cl3monoclinicC12/m12.1507,0.37193,1.5331,90,123.346.25bronzeGd6C3Cl5monoclinicC12/m1a=16.688,b=3.6969,c=12.824, β=128.266.18greyGd10C4Cl17triclinicPa=8.498, b=9.174, c=11.462, α=104.56, β=95.98, γ=111.354.70black; contains C24−Gd10C4Cl18triclinicPa = 8.498, b = 9.174, c = 11.462, α = 104.56°, β = 95.98°, γ = 111.35°, Z = 1contains C24−[Gd4(C2)](Cl, I)6tetragonalP4/mbma = 13.475, c = 12.125, Z = 2blackRb2[Gd10(C2)2]Cl19orthorhombica=1.2228, b=2.2347, c=1.3896 4.31blackCs2[Gd10(C2)2]Cl19orthorhombica=1.2344, b=2.2434, c=1.3924 4.41blackCs3[Tb10(C2)2]Cl21monoclinicC2/cZ = 4; a = 23.187; b = 12.458; c = 15.02; β = 98.13°blackLu2CCl2Rma=3.6017, c=27.167.07brownLu2CCl2Pm1a= 3.5972, c=9.09257.05Cs2Lu[Lu6C]Cl18Ra = 9.817, c = 27.232, Z = 3Hf6CCl14orthorhombicCmcea=13.938, b=12.498, c=11.3995.28W2CCl8orthorhombicPbcaa=11.96 b=12.156 c=10.95762.83blackW6CCl15monoclinicC121/c1a=9.8831 b=11.8945 c=17.867 β =107.8835.47blackW6CCl16orthorhombicPnmaa=16.637 b=12.958 c=9.7975.29blackW6CCl18P2ca=8.923 c=17.5034.82blackW30C2(Cl,Br)68triclinicPa = 12.003, b = 14.862, c = 15.792, α = 88.75°, β = 68.85°, γ = 71.19° Z=12472.9blackLi[W6CCl18]hexagonalP63/ma = 8.8648, c = 17.490 Z=21188.2black(Bu4N)[W6CCl18](Me4N)2[W6CCl18](Bu4N)2[W6CCl18](Bu4N)3[W6CCl18]Na[W6CCl18]hexagonalP63/ma=8.9592 c=17.5226 Z=21188.2Ca[W6CCl18]hexagonalP63/ma=8.9384 c=17.6526 Z=21220.4Cu[W6CCl18]triclinicPa=8.89 b=8.929 c=17.669 α=81.85 β=80.78 γ=60.39 Z=21200.75.025blackCu(C2H6OS)6[W6CCl18]monoclinicC2/ca=17.333 b=16.011 c=18.082 β=94.61 Z=45001.73.035dark brownCu(C2H6OS)4[W6CCl18]2triclinicPa=9.47 b=12.630 c=13.634 α=104.69° β=90.16° γ=92.99° Z=11575.24.095dark violetAg[W6CCl18]hexagonalP63/ma=8.874 c=17.58 Z=21199Cs[W6CCl18]·CH3OHorthorhombicP212121a = 9.6957, b = 14.046, c = 20.238 Z=44.623black; W in trigonal prism around C
References