Carbide chloride

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

formula	system	space group	unit cell	volume	density	comment	reference
Ca3C3Cl2	orthorhombic	Cmcm	a=3.876, b=13.524, c=11.653		2.47	red	[1]
Sc2CCl2		P3m1	a=3.39977 c=8.858		3.24	black	[2]
Sc5CCl8	monoclinic	C12/m1	a=17.8 b=3.5259 c=12.052 β=130.11		2.99		[2]
Sc7C2Cl10	monoclinic	C12/m1	a=18.62 b=11.81 β=99.81		3.04	ruby red; moisture sensitive	[3] [2]
Ti6CCl14	orthorhombic	Cmce	a=12.4592 b=12.2458 c=10.9576		2.93	black	[2]
YCCl		C12/m1	a=6.82 b=3.713 c=9.327 β=94.75		3.85		[2]
Y2C0.7Cl2		P3m1	a=3.7022 c=9.195		3.91	silvery grey	[2]
Zr6CCl14	orthorhombic	Cmce	a=14.091 b=12.595 c=11.506		3.43	brown red	[4] [2]
KZr6CCl15	orthorhombic	Pnma	a=18.489 b=13.909 c=9.690 Z=4	2492		dark red; Zr6C clusters	[5]
Rb4Zr6CCl18		C2/m	a=10.460 b=17.239 c=9.721 β=115.05 Z=2				[6]
Rb[(Zr6C)Cl15]	orthorhombic	Pnma	a=18.484,b= 18.962,c=9.708 Z= 4	2505.4	3.12	dark red-brown	[7]
Cs4[Sc6C]Cl13	tetragonal	I41/amd	a = 15.405, c = 10.179 Z=4			green black	[8]
Cs[(Zr6C)Cl15]	orthorhombic	Pnma	a = 18.513 b = 13.916 c = 9.6383 Z=4	2483.1		dark red	[9]
La2CCl		R3m	a=3.878 c=16.91		5.74	coppery red	[10]
La2C2Cl	monoclinic	C12/c1	a=14.77 b=4.187 c=6.802 β=101.5		5.44	gold	[11] [10]
La3C3Cl2	monoclinic	C12/c1	a=7.771 b=12.962 c=6.91 β=104.3		5.16	gold	[10]
La4C2Cl5	orthorhombic	Immm	a=3.92 b=7.945 c=19.297		4.67	black	[10]
La4C5Cl2	monoclinic	C12/m1	a=22.57 b=3.91 c=1.019 β=95.69		5.07	gold	[10]
La5C2Cl9	triclinic	P1	a=8.645 b=8.706 c=11.925 α=84.97° β=85.78° γ=61.31°		4.40	red	[10]
La6(C2)3Cl4	monoclinic	P21/c	a = 7.770, b = 12.962, c = 6.910 and β = 104.30° Z=2	674.4	5.158	gold; sheets of octahedra	[12]
La8C8Cl5	monoclinic	P121/c1	a=7.756 b=16.951 c=6.878 β=104.2		5.24	gold	[11] [10]
La8(C2)5Cl4	monoclinic	C2/m	a = 22.570, b = 3.9300, c = 10.190 β = 95.69° Z=2	899.4	5.071	gold	[12]
La11C11Cl7	monoclinic	P121/c1	a=7.77 b=47.038 c=6.901 β=104.28		5.19	gold	[10]
La14C14Cl9	monoclinic	P1C1	a=7.775 b=2.9963 c=6.895 β=104.21		5.19	gold	[11] [10]
La20C20Cl13	monoclinic	P121/c1	a=7.762 b=42.941 c=6.903 β=104.26		5.18	black	[11] [10]
La36C36Cl23	monoclinic	P121/c1	a=7.764 b=77.055 c=6.897 β=104.26		5.18	grey	[11] [10]
K[La5(C2)]Cl10	monoclinic	P21/c	a=8.5632, b=15.074, 17.115 β=119.74 Z=4	1918.3	3.85	light red	[13]
Ce2C2Cl	monoclinic	C12/c1	a=14.573, b=4.129, c=6.696, β=101.37		5.71	gold	[1]
Ce2(C2)2Cl	monoclinic	C2/c	a = 14.573, b = 4.129, c = 6.696, β = 101.37 °				[14]
Ce3CCl5	monoclinic	C12/c1	a=13.899, b=8.71, c=15.765, β=98.22		4.29	orange	[1]
Ce4CCl8	monoclinic	P1C1	a=13.538, b=10.487, c=22.845, β=126.31		4.35	black	[10] [15]
Ce5C2Cl9	triclinic	P1	a=8.57, b=8.627, c=11.869, α=84.8, β=85.5, γ=61.29			red	[1]
Ce6Cl10C2	monoclinic	C12/c1	a= 13.899,b= 8.710,c= 15.765,β= 98.22° Z=4	1888.9			[16]
Ce8C8Cl5	monoclinic	P121/c1	a=7.669, b=16.784, c=6.798, β=104.05		5.46	gold	[11] [1]
Ce18(C2)9Cl11	triclinic	P1	a = 6.771, b = 7.657, c = 18.98,α = 88.90 °, β = 80.32 °, γ = 76.09 °				[14]
Ce26(C2)13Cl16	monoclinic	P21/c	a = 7.664, b = 54.25, c = 6.796, β = 103.98 °				[14]
K[Ce5(C2)]Cl10	monoclinic	P21/c	a=8.4739, b=15.017, c=1639 β=119.76 Z=4	1871.2	3.97	red	[13]
Pr3CCl5	monoclinic	C12/c1	a=13.867 b=8.638 c=15.69 β=97.67		4.37	yellow	[2]
Pr4C2Cl5	orthorhombic	Immm	a=3.848 b=7.759 c=17.01		5.00	black	[2]
Pr5C2Cl9	triclinic	P1	a=8.526 b=8.592 c=11.821 α=84.77 β=85.42 γ=61.26		4.61	brown red	[2]
Pr6C2Cl10	monoclinic	C2/c	a = 13.687, b = 8.638, c = 15.690, β = 97.67°			yellow to green	[17]
Pr8C8Cl5	monoclinic	C121/c1	a=7.617 b=16.689 c=6.769 β=103.94		5.57	gold	[2]
Pr11C11Cl7	monoclinic	P121/c1	a=7.612 b=6.127 c=6.761 β=103.92		5.56	gold	[2]
Pr14C14Cl9	monoclinic	P1c1	a=7.611 b=29.392 c=6.764 β=103.9		5.56	gold	[2]
K{Pr5(C2)}Cl10	hexagonal	P63/m	a=8.426 c=14.894 Z=2	915.9		dark red	[18]
Rb{Pr5(C2)}Cl10	hexagonal	P63/m	a=8.4499, c=14.976 Z=2	926	4.19	red; trigonal bipyrmamid of Pr containing a C2 unit	[19]
Rb[Nd5(C2)]Cl10	hexagonal		a=08.398, c=14.88		4.33	dark red	[13]
Gd2C2Cl		P3m	a=3.6902, c=20.308				[10]
Gd2C2Cl2	monoclinic	P3m1	a=3.7633, c=9.4593		5.69	black; contains C24−	[4] [10]
Gd3CCl3	cubic	I4132	a=10.734		6.34		[10]
Gd4C2Cl3	orthorhombic	Pnma	a=10.596, b=3.684, c=19.627		6.58	bronze	[10] [20]
Gd5C2Cl9	monoclinic	P121/c1	a=9.182, b=16.12, c=12.886, β=119.86		4.54	black	[10]
Gd5C6Cl3	monoclinic	C12/m1	2.1507,0.37193,1.5331,90,123.34		6.25	bronze	[10]
Gd6C3Cl5	monoclinic	C12/m1	a=16.688,b=3.6969,c=12.824, β=128.26		6.18	grey	[10]
Gd10C4Cl17	triclinic	P1	a=8.498, b=9.174, c=11.462, α=104.56, β=95.98, γ=111.35		4.70	black; contains C24−	[4] [10]
Gd10C4Cl18	triclinic	P1	a = 8.498, b = 9.174, c = 11.462, α = 104.56°, β = 95.98°, γ = 111.35°, Z = 1			contains C24−	[21] [4]
[Gd4(C2)](Cl, I)6	tetragonal	P4/mbm	a = 13.475, c = 12.125, Z = 2			black	[22]
Rb2[Gd10(C2)2]Cl19	orthorhombic		a=1.2228, b=2.2347, c=1.3896		4.31	black	[23]
Cs2[Gd10(C2)2]Cl19	orthorhombic		a=1.2344, b=2.2434, c=1.3924		4.41	black	[23]
Cs3[Tb10(C2)2]Cl21	monoclinic	C2/c	Z = 4; a = 23.187; b = 12.458; c = 15.02; β = 98.13°			black	[24]
Lu2CCl2		R3m	a=3.6017, c=27.16		7.07	brown	[10]
Lu2CCl2		P3m1	a= 3.5972, c=9.0925		7.05		[10]
Cs2Lu[Lu6C]Cl18		R3	a = 9.817, c = 27.232, Z = 3				[25]
Hf6CCl14	orthorhombic	Cmce	a=13.938, b=12.498, c=11.399		5.28		[10]
W2CCl8	orthorhombic	Pbca	a=11.96 b=12.156 c=10.9576		2.83	black	[2]
W6CCl15	monoclinic	C121/c1	a=9.8831 b=11.8945 c=17.867 β =107.883		5.47	black	[2]
W6CCl16	orthorhombic	Pnma	a=16.637 b=12.958 c=9.797		5.29	black	[2]
W6CCl18		P62c	a=8.923 c=17.503		4.82	black	[2]
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		black	[26]
Li[W6CCl18]	hexagonal	P63/m	a = 8.8648, c = 17.490 Z=2	1188.2		black	[27] [28]
(Bu4N)[W6CCl18]							[29]
(Me4N)2[W6CCl18]							[28]
(Bu4N)2[W6CCl18]							[29]
(Bu4N)3[W6CCl18]							[29]
Na[W6CCl18]	hexagonal	P63/m	a=8.9592 c=17.5226 Z=2	1188.2			[28]
Ca[W6CCl18]	hexagonal	P63/m	a=8.9384 c=17.6526 Z=2	1220.4			[28]
Cu[W6CCl18]	triclinic	P1	a=8.89 b=8.929 c=17.669 α=81.85 β=80.78 γ=60.39 Z=2	1200.7	5.025	black	[30]
Cu(C2H6OS)6[W6CCl18]	monoclinic	C2/c	a=17.333 b=16.011 c=18.082 β=94.61 Z=4	5001.7	3.035	dark brown	[30]
Cu(C2H6OS)4[W6CCl18]2	triclinic	P1	a=9.47 b=12.630 c=13.634 α=104.69° β=90.16° γ=92.99° Z=1	1575.2	4.095	dark violet	[30]
Ag[W6CCl18]	hexagonal	P63/m	a=8.874 c=17.58 Z=2	1199			[28]
Cs[W6CCl18]·CH3OH	orthorhombic	P212121	a = 9.6957, b =  14.046, c = 20.238 Z=4		4.623	black; W in trigonal prism around C	[27]

References

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