Carbide bromide
Carbide bromides are
anions. Many carbide bromides arecluster compounds, containing on, two or more carbon atoms in a core, surrounded by a layer of metal atoms, encased in a shell of bromide ions. These ions may be shared between clusters to form chains, double chains or layers.[1]
The great majority of these carbide bromide compounds contain
monoclinic crystal results. The C2 unit sits at an angle to the layers, and thus reduces symmetry compared to compounds with single carbon atoms in the cluster.[1]
In R2CBr there are layers of R6C that share bromide between layers.[1]
List
formula | system | space group | unit cell | volume | density | comment | reference |
---|---|---|---|---|---|---|---|
Sc7CBr12 | trigonal | R3 | a=13.628, c=9.203 | 4.33 | [2] | ||
Y2CBr2 | trigonal | R3m | a=3.7545, c=29.125 | 4.90 | bronze | [2] | |
Y2C2Br2 | monoclinic | C12/m1 | a=6.953, b=3.764, c=9.938, β=99.98 | 3.85 | superconductor Tc=5.04K | [2][3] | |
Y2C0.7Br2 | trigonal | P3m1 | a=3.73 c=9.864 | 4.83 | grey | [2] | |
Y10Br18(C2)2 | monoclinic | P21/n | a=9.729 b=16.323 c=13.229 β =121.131° Z=24 | 1798.3 | black | [4] | |
Na0.23Y2C2Br2 | monoclinic | C2/m | a=7.061, b=3.724, c=10.464, β=92.96 | 4.43 | copper red | [5] | |
Zr6CBr14 | orthorhombic | Cmce | a=14.69 b=13.229 c=11.991 | [2] | |||
NaZr6CBr14 | orthorhombic | Cmca | a=14.6876, b=13.2266, c=11.9864 | [5] | |||
K4Zr6Br18C | triclinic | P1 | a=10.114, b=10.283, c=10.374, α=118.54, β=99.98, γ=104.08, Z=1 | [6] | |||
RbZr6CBr14 | orthorhombic | Cmca | a=14.719, b=13.287, c=12.043 | [5] | |||
Cs2Zr6Br10C | trigonal | R3c | a=13.0862 c=35.823 Z=6 | 5312.8 | [7] | ||
CsZr6Br9C | trigonal | R3c | a=13.1031 c=35.800 Z=6 | 5321.5 | [7] | ||
Cs3Zr6Br15C | trigonal | R3c | a=13.116 c=35.980 Z=6 | [7] | |||
Cs4Zr6Br15C | trigonal | R3c | a=13.098 c=35.756 Z=6 | 5312 | [7] | ||
La2C2Br | monoclinic | C12/c1 | a=15.313, b=4.193, c=6.842, β=100.53,90 | 5.87 | [8] | ||
La3CBr5 | monoclinic | C12/c1 | a=14.234, b=10.858, c=14.588, β =106.8 | 5.10 | yellow | [8] | |
La3C2Br3 | orthorhombic | C2221 | a=11.533, b=17.0698, c=17.054 | 5.38 | bronze | [8] | |
La4C2Br5 | orthorhombic | Immm | a = 3.9950, b = 8.277, c = 18.101 | 5.43 | black | [9] | |
La5C2Br9 | orthorhombic | Pnma | a=11.309, b=9.9477, c=16.4911 | 5.15 | red | [2] | |
La5C6Br3 | monoclinic | C12/m1 | a=22.809, b=3.9855, c=16.599, β=123.32 | 5.30 | bronze | [2] | |
La6C2Br9 | monoclinic | C2/c | a=14,234 b=10.858 c=14.588 β=106.80 Z=4 | 2158.4 | 4.85 | yellow insulator | [10] |
La10(C2)6Br6 | monoclinic | C2/m | a = 22.809, b = 3.9855, c = 16.599, β = 123.32° Z=2 | 1260.9 | 5.301 | bronze; air sensitive | [11] |
La3Br2C2B | Pnma | f =15.323, b = 3.973, c =11.567 | black | [12] | |||
Ce2C2Br | monoclinic | C2/c | a = 15.120, b = 4.179, c = 6.743, β = 101.09 ° | [13] | |||
Ce4CBr5 | monoclinic | C2/m | a = 18.306, b = 3.9735, c = 8.378, β=104.91° | [14] | |||
Ce4C1.5Br5 | monoclinic | C2/m | a = 18.996, b = 3.9310, c = 8.282, β = 106.74° | [14] | |||
Ce4C2Br5 | orthorhombic | Immm | a = 3.9835, b = 8.186, c = 18.017 | 5.54 | violet | [9] | |
Ce4Br3C4 | triclinic | P 1 | a = 4.227, b = 11.034, c = 11.268, α = 77.15°, β = 90.13° and γ = 84.42° | [15] | |||
Ce10(C2)6Br6 | monoclinic | C2/m | a = 22.483, b = 3.9253, c = 16.375, β = 123.15° Z=2 | 1209.9 | 5.558 | bronze; air sensitive | [11] |
Ce6Br3C3B2 | monoclinic | P21/m | a = 8.602, b = 3.829, c = 10.220, β = 112.53 | black | [12] | ||
Pr2CBr | hexagonal | P63/mmc | a=3.8071, c=14.7787 | 6.69 | black | [2] | |
Pr2C2Br | monoclinic | C12/c1 | a=15.054, b=4.139, c=6.713, β=101.08 | 6.24 | [2] | ||
Pr3CBr3 | cubic | I4131 | a=11.61 | 5.73 | [2] | ||
Pr3CBr5 | triclinic | P1 | a=7.571, b=9.004, c=9.062, α=108.57, β=97.77, γ=106.28 | 5.09 | black | [2] | |
Pr4C1.3Br5 | monoclinic | C2/m | a = 18.467, b = 3.911, c = 8.258, β = 105.25° | [14] | |||
Pr4C1.5Br5 | monoclinic | C2/m | a = 19.044, b = 3.9368, c = 8.254, β = 106.48° | [14] | |||
Pr5C2Br8 | triclinic | P1 | a=9.096, b=12.185, c=16.688, α=79.57, β=89.86, γ=84.38 | 5.02 | black | [2] | |
Pr5C2Br9 | monoclinic | P21/n | a = 10.069; b = 18.861; c = 10.459; β = 108.130° Z = 4 | 5.09 | dark red | [2] | |
Pr5C6Br3 | monoclinic | C12/m1 | a=22.36, b=3.895, c=16.269, β=90,123.44 | 5,71 | [2] | ||
Pr6C2Br10 | triclinic | P1 | a=7.571 b=9.004 c=9.062 α=108.57° β=97.77° γ=106.28° Z=1 | 544.8 | 5.09 | black | [16] |
Pr7C3Br10 | a=9.054, b=11.1265, c=13.352, α=79.641, β=72.57, γ=64.67 | 5.22 | black | [2] | |||
Pr10C4Br15 | triclinic | P1 | a=9.098 b=10.127 c=10.965 α=70.38° β=66.31° γ=70.84° Z=1 | 849.3 | 5.19 | silver | [16] |
Pr10(C2)2Br16 | triclinic | P1 | a = 9.096, b = 12.185, c = 16.688, α = 79.57°, β = 89.86°, γ = 84.38° | metallic black | [17] | ||
Pr10(C2)6Br6 | monoclinic | C2/m | a = 22.36, b = 3.895, c = 16.269, β = 123.44° Z=2 | bronze; air sensitive | [11] | ||
Pr14C6Br20 | triclinic | P1 | a=9.098 b=10.935 c=13.352 α=86.27° β=75.57° γ=66.88° Z=1 | 1157.8 | 5.23 | black | [16] |
Pr6C2Cl5Br5 | monoclinic | C2/c | a = 13.689(1) Å, b = 10.383(1) Å, c = 14.089(1) Å, β = 106.49(1)° | yellow to green | [18] | ||
Gd2CBr | hexagonal | P63/mmc | a=3.7858, c=14.209 | 7.65 | dark grey | [8] | |
Gd2Br2C | trigonal | P3m1 | a=3.8209, c=9.824 | black | [19] | ||
3s-Gd2C2Br2 | monoclinic | C2/m | a = 7.066, b = 3.827, c = 9.967, β = 99.95° | 5.69 | black; contains C24− | [20][21][22] | |
Gd2C2Br2 | monoclinic | C2/m | a=7.025, b=3.8361, c=9.868, β =94.47 | 6.24 | gold | [8] | |
Gd4C2Br3 | orthorhombic | Pnma | a = 10.844, b = 3.730, c = 20.361 | 6.58 | bronze | [23] | |
Gd10C4Br18 | monoclinic | P21/n | a=9.7406 b=16.4817 c=11.8604 β =104.394° Z=24 | contains C24− | [4] | ||
Gd10(C2)6Br6 | monoclinic | C2/m | a = 21.507, b = 3.7193, c = 15.331, β = 123.34° Z=2 | 1024.5 | 6.254 | bronze; air sensitive | [11] |
Gd4Br3C2B | monoclinic | P21/m | a=9.547, b=3.693, c=l2.44,5, β=106.68 | black | [12] | ||
K2[Gd10(C2)2]Br19 | orthorhombic | Pbcn | a=12.751, b=23.17, c=14.423 | 5.01 | black | [24] | |
K2[Gd10(C2)2]Br20 | orthorhombic | Pbca | a=1.2751, b=2.317, c=1.4423 | 4.70 | black | [24] | |
Rb2[Gd10(C2)2]Br19 | orthorhombic | Pbcn | a=1.2737, b=2.325, c=1.4412 | 5.15 | black | [24] | |
Cs2[Gd10(C2)2]Br19 | orthorhombic | [24] | |||||
TbCBr | monolinic | C12/m1 | a=7.015, b=3.801, c=9.948, β=100.05 | 6.28 | [2] | ||
Tb2CBr | hexagonal | P63/mmc | a=3.6915, c=14.043 | 8.21 | [2] | ||
Tb2CBrH | hexagonal | P63mc | a=3.7376, c=14.315 | 7.88 | [5] | ||
Tb4C2Br3 | orthorhombic | Pnma | a = 10.743, b = 3.706, c = 20.194 | 7.31 | bronze | [23] | |
Tb10Br18(C2)2 | monolinic | P121/c1 | a=9.7562 b=16.4254 c=13.3043 β =120.675° | 1833.7 | 5.57 | dark red | [4][2] |
Rb2[Tb10(C2)2]Br19 | orthorhombic | a=1.2664, b=2.3105, c=1.4303 | black | [24] | |||
Dy10Br18(C2)2 | monolinic | P21/c | a = 9.740 b = 16.340 c = 13.247 β = 120.869° Z = 2 | 1809.6 | black | [25] | |
Ho10Br18(C2)2 | monolinic | P21/n | a=9.6838 b=16.2436 c=11.6374 β =104.427° Z=24 | 1772.8 | [4] | ||
[Er10(C2)2]Br18 | monoclinic | P21/n | a = 9.718, b = 16.234, c = 11.638, β = 104.00°; Z = 2 | 5.89 | black | [26] | |
Lu2CBr2 | trigonal | R3m | a= 3.6663, c=28.799 | 7.75 | gold | [2] | |
La0.9Lu0.1CBr | monoclinic | C2/m | a=7.434, b=4.0568, c=10.046, β=93.7 | 5.15 | [5] | ||
W30C2(Cl,Br)68 | triclinic | P1 | a = 12.003, b = 14.862, c = 15.792, α = 88.75°, β = 68.85°, γ = 71.19° Z=1 | 2472.9 | 6.35 | black | [27] |
Th6CBr15 | orthorhombic | Cmce | a=15.764, b=14.16, c=13.124 | 5.72 | green | [28] | |
Y0.8Th0.2CBr | monoclinic | C2/m | a=7.061, b=3.776, c=9.983, β=100.36 | 5.31 | [5] |
References
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