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Silicon-oxygen bond
Ruthenium(II) iodide, RuI₂, blue according to G&E p. 1083. Binary Ru(II) halides not well characterised according to Housecroft p. 780.
Ruthenium(III) iodide, RuI₃, black according to G&E p. 1083. Synthesis is RuO₄ + aq HI → RuI₃ and adopts extended structure with octahedral Ru(III) per Housecroft p. 779.

Chalcogen oxohalides

Existing content

Oxohalide#Main group elements has a section on chalcogen oxohalides
Nothing at chalcogen
Brief mentions at Sulfur#Halogenation
Brief mentions at Selenium#Halogen compounds
Tellurium#Halides mentions the –OTeF₅ group and a few compounds in which it occurs

Table of chalcogen oxohalides

Chalcogen oxohalides
Stoichiometry	Oxidation state of Z	Sulfur	Selenium	Tellurium
References		^[1]^[2]	^[3]	^[3]
ZOX₂	+4	SOF₂, SOFCl, SOCl₂, SOBr₂	SeOF₂, SeOCl₂, SeOBr₂
ZO₂X₂	+6	SO₂F₂, SO₂FCl, SO₂Cl₂, SO₂Br₂	SeO₂F₂
ZOX₄	+6		(SeOF₄)₂ i.e. Se₂O₂F₈	(TeOF₄)₂ i.e. Te₂O₂F₈
X₅ZOX	+6		F₅SeOF	F₅TeOF
X₅ZOZX₅	+6	F₅SOSF₅	F₅SeOSeF₅	F₅TeOTeF₅
X₅ZOOZX₅	+6		F₅SeOOSeF₅
Z₃O₂X₁₄	+6			Te₃O₂F₁₄
Z₆O₅X₂₆	+6			Te₆O₅F₂₆
X₄Z(OZX₅)₂	+6			cis- and trans-F₄Te(OTeF₅)₂
X₂Z(OZX₅)₄	+6			cis- and trans-F₂Te(OTeF₅)₄
XZ(OZX₅)₅	+6			FTe(OTeF₅)₅
Z(OZX₅)₆	+6			Te(OTeF₅)₆

Chalcogen halides

Chalcogen halides (G&E pp. 767–776)
Stoichiometry	Oxidation state of Z	Oxygen	Sulfur	Selenium	Tellurium	Polonium
Z₂X	+½				Te₂Cl Te₂Br Te₂I
Z₃X₂	+⅔				Te₃Cl₂
ZX	+1				TeI
Z₂X₂	+1	O₂F₂ O₂Cl₂	S₂F₂ S₂Cl₂ S₂Br₂	Se=SeF₂ Se₂F₂ Se₂Cl₂ Se₂Br₂ Se₂I₂	Te₂F₂ Te₂Cl₂ Te₂Br₂
ZX₂	+2	OF₂ OCl₂ OBr₂ OI₂	SF₂ SCl₂ SBr₂	SeF₂ SeCl₂ SeBr₂	TeF₂ TeCl₂ TeBr₂	PoCl₂ PoBr₂ PoI₂
ZX₄	+4		SF₄ SCl₄	SeF₄ SeCl₄ SeBr₄	TeF₄ TeCl₄ TeBr₄ TeI₄	PoF₄ PoCl₄ PoBr₄ PoI₄
ZX₆	+6		SF₆	SeF₆	TeF₆	PoF₆

Lanthanide compound photos

Photos of trivalent lanthanide compounds
	La	Ce	Pr	Nd	Pm	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu
Ln₂O₃
Ln(OH)₃
LnF₃
LnCl₃
LnBr₃
LnI₃
Ln(NO₃)₃
Ln₂(SO₄)₃
Ln(OAc)₃

Deltahedral boron clusters

Molecular structures of deltahedral boron clusters from crystal structures
	closo	nido	arachno
4
5			[B₃H₈]⁻
6	[B₆H₆]²⁻	B₅H₉	B₄H₁₀
7	[B₇H₇]²⁻	B₆H₁₀	B₅H₁₁
8	[B₈H₈]²⁻		B₆H₁₂
9	[B₉H₉]²⁻
10	[B₁₀H₁₀]²⁻	[B₉H₁₂]⁻
11	[B₁₁H₁₁]²⁻	B₁₀H₁₄	B₉H₁₅
12	[B₁₂H₁₂]²⁻	[B₁₁H₁₄]⁻	[B₁₀H₁₄]²⁻

Monochlorides

v t e Crystal structure of monochlorides in the periodic table
1 H																	2 He
3 LiCl	4 Be											5 B	6 C	7 N	8 O	9 FCl	10 Ne
11 NaCl	12 Mg											13 Al	14 Si	15 P	16 S₂Cl₂	17 Cl₂	18 Ar
19 KCl	20 Ca	21 Sc	22 Ti	23 V	24 Cr	25 Mn	26 Fe	27 Co	28 Ni	29 CuCl	30 Zn	31 Ga	32 Ge	33 As	34 Se₂Cl₂	35 BrCl	36 Kr
37 RbCl	38 Sr	39 Y	40 Zr	41 Nb	42 Mo	43 Tc	44 Ru	45 Rh	46 Pd	47 AgCl	48 Cd	49 InCl	50 Sn	51 Sb	52 Te	53 ICl	54 Xe
55 CsCl	56 Ba	71 Lu	72 Hf	73 Ta	74 W	75 Re	76 Os	77 Ir	78 Pt	79 AuCl	80 Hg₂Cl₂	81 TlCl	82 Pb	83 Bi	84 Po	85 AtCl	86 Rn
87 Fr	88 Ra	103 Lr	104 Rf	105 Db	106 Sg	107 Bh	108 Hs	109 Mt	110 Ds	111 Rg	112 Cn	113 Nh	114 Fl	115 Mc	116 Lv	117 Ts	118 Og

		57 La	58 Ce	59 Pr	60 Nd	61 Pm	62 Sm	63 Eu	64 Gd	65 Tb	66 Dy	67 Ho	68 Er	69 Tm	70 Yb
		89 Ac	90 Th	91 Pa	92 U	93 Np	94 Pu	95 Am	96 Cm	97 Bk	98 Cf	99 Es	100 Fm	101 Md	102 No

Legend:
other
NaCl
CsCl
α-ZnS
β-ZnS
NiAs
unknown or uncertain

Dichlorides

Cadmium chloride (CdCl₂) structure
Cadmium iodide (CdI₂) structure
Fluorite (CaF₂) structure
Antifluorite structure, e.g. Na₂O
Rutile (TiO₂) structure
Antirutile structure, e.g. Ti₂N
Beryllium bromide (BeBr₂) structure
β-Cristobalite (SiO₂) structure, e.g. BeF₂

Trichlorides

v t e Crystal structure of trichlorides in the periodic table
1 H																	2 He
3 Li	4 Be											5 BCl₃	6 C	7 NCl₃	8 O	9 F	10 Ne
11 Na	12 Mg											13 AlCl₃	14 Si	15 PCl₃	16 S	17 Cl	18 Ar
19 K	20 Ca	21 ScCl₃	22 Ti	23 VCl₃	24 CrCl₃	25 Mn	26 FeCl₃	27 Co	28 Ni	29 Cu	30 Zn	31 GaCl₃	32 Ge	33 AsCl₃	34 Se	35 Br	36 Kr
37 Rb	38 Sr	39 YCl₃	40 ZrCl₃	41 Nb	42 α-MoCl₃	43 Tc	44 RuCl₃	45 RhCl₃	46 Pd	47 Ag	48 Cd	49 InCl₃	50 Sn	51 SbCl₃	52 Te	53 ICl₃	54 Xe
55 Cs	56 Ba	71 LuCl₃	72 Hf	73 Ta	74 WCl₃	75 ReCl₃	76 Os	77 α-IrCl₃	78 Pt	79 AuCl₃	80 Hg	81 Tl	82 Pb	83 BiCl₃	84 Po	85 At	86 Rn
87 Fr	88 Ra	103 Lr	104 Rf	105 Db	106 Sg	107 Bh	108 Hs	109 Mt	110 Ds	111 Rg	112 Cn	113 Nh	114 Fl	115 Mc	116 Lv	117 Ts	118 Og

		57 LaCl₃	58 CeCl₃	59 PrCl₃	60 NdCl₃	61 PmCl₃	62 SmCl₃	63 EuCl₃	64 GdCl₃	65 TbCl₃	66 DyCl₃	67 HoCl₃	68 ErCl₃	69 TmCl₃	70 YbCl₃
		89 AcCl₃	90 Th	91 Pa	92 UCl₃	93 NpCl₃	94 PuCl₃	95 AmCl₃	96 Cm	97 Bk	98 Cf	99 Es	100 Fm	101 Md	102 No

Legend:
other
II
III
IV
V
VI
UCl₃
AlCl₃ / YCl₃
IX
X
BiI₃
unknown or uncertain

^ Housecroft pp. 509–512
^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 687–689, 692, 693–695. ISBN 978-0-08-037941-8.
^ ^a ^b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 777–778. ISBN 978-0-08-037941-8.

[Housecroft-1] Housecroft pp. 509–512

[G&E_S-2] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 687–689, 692, 693–695. ISBN 978-0-08-037941-8.

[G&E_SeTe-3] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 777–778. ISBN 978-0-08-037941-8.

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[2]

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