Rhenium heptafluoride

Template:Chembox DeltaHvap Rhenium heptafluoride

Names
IUPAC name

rhenium heptafluoride, heptafluoridorhenium

Identifiers

CAS Number

* 17029-21-9 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 26323924 N

PubChem CID

* 123369

UNII |

* H54U6B0W52 Y

InChI

* InChI=1S/7FH.Re/h7*1H;/q;;;;;;;+7/p-7 N

Key: HFHBKXWKPQUYIA-UHFFFAOYSA-G N

* InChI=1/7FH.Re/h7*1H;/q;;;;;;;+7/p-7/rF7Re/c1-8(2,3,4,5,6)7

Key: HFHBKXWKPQUYIA-KLJGHBABAK

SMILES

* F[Re](F)(F)(F)(F)(F)F

Properties

Chemical formula

| ReF7
Molar mass | 319.196 g/mol
Appearance  | Bright yellow crystalline solid
Density | 4.3 g/cm3
Melting point |  48.3 °C (118.9 °F; 321.4 K)
Boiling point |  73.72 °C (164.70 °F; 346.87 K)

Solubility in water

| Reacts
Vapor pressure | 13.41 kPa[1]
Structure

Crystal structure

| triclinic, aP16

Space group

| P1 (No. 2)
Thermochemistry

Enthalpy of fusion (ΔfH⦵fus)

| 7.53 kJ/mol[1]
Related compounds

Related compounds

| Osmium heptafluoride

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N verify (what is YN ?)
Infobox references

Rhenium heptafluoride is the compound with the formula ReF7. It is a yellow low melting solid and is the only thermally stable metal heptafluoride.[2] It has a distorted pentagonal bipyramidal structure similar to IF7, which was confirmed by neutron diffraction at 1.5 K.[3] The structure is non-rigid, as evidenced by electron diffraction studies.[4]

## Production, reactions and properties

Rhenium heptafluoride can be prepared from the elements at 400 °C:[5]

2 Re + 7 F2 → 2 ReF7

It also can be produced by the explosion of rhenium metal under sulfur hexafluoride. [6]

It hydrolyzes under a base to form perrhenic acid and hydrogen fluoride:[1]

ReF7 \+ 4H2O → HReO4 \+ 7HF

With fluoride donors such as CsF, the ReF−8 anion is formed, which has a square antiprismatic structure.[7] With antimony pentafluoride, SbF5, a fluoride acceptor, the ReF+6 cation is formed.[5]

## References

1. ↑ 1.0 1.1 1.2 1.3 J.G.Malm; H.Selig (1961). "The vapour-pressures and other properties of ReF6 and ReF7" (in English). Journal of Inorganic and Nuclear Chemistry 20 (3): 189–197. doi:10.1016/0022-1902(61)80267-4.
2. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
3. ↑ Vogt T.; Fitch A. N.; Cockcroft J. K. (1994). "Crystal and Molecular Structures of Rhenium Heptafluoride". Science 263 (5151): 1265–7. doi:10.1126/science.263.5151.1265. PMID 17817431. Bibcode: 1994Sci...263.1265V.
4. ↑ Jacob, E. Jean; Bartell, L.S.J. (1970). "Electron Diffraction Study of Rhenium Fluorides. II. Structure, Pseudorotation, and Anharmonic Coupling of Modes in ReF7". The Journal of Chemical Physics 53 (6): 2235. doi:10.1063/1.1674318. Bibcode: 1970JChPh..53.2235J. https://deepblue.lib.umich.edu/bitstream/2027.42/70852/2/JCPSA6-53-6-2235-1.pdf.
5. ↑ 5.0 5.1 A. F. Holleman; Wiberg, Egon; Wiberg, Nils (2001). Inorganic Chemistry. Boston: Academic Press. ISBN 0-12-352651-5.
6. ↑ Richard L. Johnson; Bernard Siegel (1969). "On the synthesis of ReF7 and the existence of ReF2 and ReF3" (in English). Journal of Inorganic and Nuclear Chemistry 31 (8): 2391–2396. doi:10.1016/0022-1902(69)80569-5.
7. ↑ Hwang, I; Seppelt, K. (2000). "The structures of ReF−8 and UF2−8". Journal of Fluorine Chemistry 102 (1–2): 69–72. doi:10.1016/S0022-1139(99)00248-1.ReF−8+and+UF2−8&rft.jtitle=Journal+of+Fluorine+Chemistry&rft.aulast=Hwang,+I&rft.au=Hwang,+I&rft.au=Seppelt,+K.&rft.date=2000&rft.volume=102&rft.issue=1–2&rft.pages=69–72&rft_id=info:doi/10.1016/S0022-1139(99)00248-1&rfr_id=info:sid/en.wikibooks.org:Chemistry:Rhenium_heptafluoride">

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Rhenium compounds

Rhenium(0)|

| Organorhenium(0)|

* Re2(CO)10

|

Rhenium(I)|

| Organorhenium(I)|

* Re(CO)5Br
* ReH(CO)5

|

Rhenium(II)|

* ReB2

Rhenium(III)|

* ReCl3

Rhenium(IV)|

* ReO2
* ReS2
* ReSe2
* ReTe2

Rhenium(V)|

* ReOCl3(P(C6H5)3)2
* ReCl5

Rhenium(VI)|

* ReF6
* ReO3

Rhenium(VII)|

* ReF7
* Re2O7
* Re2S7
* Re2O7(OH2)2
* NH4ReO4
* NaReO4
* K2ReH9

| Organorhenium(VII)|

* CH3ReO3

|

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Salts and covalent derivatives of the fluoride ion

HF |  |  |  | He

|
|
|
|

LiF | BeF2 | BF
BF3
B2F4 | CF4
other compounds | NF3
FN3
N2F2
N2F4
NF5§  | F2O
F2O2
other compounds | F2 | Ne
NaF | MgF2 | AlF
AlF3 | SiF4 | P2F4
PF3
PF5 | S2F2
SF2
SF4
SF6 | ClF
ClF3
ClF5 | Ar
KF | CaF
CaF2 | ScF3 | TiF2
TiF3
TiF4 | VF2
VF3
VF4
VF5 | CrF2
CrF3
CrF4
CrF5
CrF6§  | MnF2 | FeF2
FeF3 | CoF2
CoF3 | NiF2 | CuF
CuF2 | ZnF2 | GaF2
GaF3 | GeF2
GeF4 | AsF3
AsF5 | Se2F2
SeF4
SeF6 | BrF
BrF3
BrF5 | KrF2
RbF | SrF
SrF2 | YF3 | ZrF3
ZrF4 | NbF4
NbF5 | MoF2
MoF3
MoF4
MoF5
MoF6 | TcF4
TcF6 | RuF3
RuF5
RuF6 | RhF3
RhF5
RhF6 | PdF2 | AgF | CdF2 | InF
InF2
InF3 | SnF2
SnF4 | SbF3
SbF5 | Te3F2
TeF4
TeF6 | IF
IF3</br>IF5</br>IF7 | XeF2
XeF4
XeF6
CsF | BaF2 |  | HfF4 | TaF5 | WF2
WF3
WF4
WF5
WF6 | Re3F9
ReF4
ReF5
ReF6
ReF7 | OsF4
OsF5
OsF6 | IrF2
IrF3
IrF4
IrF5
IrF6 | PtF2
PtF4
PtF5
PtF6 | AuF
AuF3
Au2F10
AuF5•F2 | Hg2F2
HgF2
HgF4 | TlF | PbF2
PbF4 | BiF3
BiF5 | PoF2
PoF4
PoF6 | AtF  | RnF2
FrF | RaF2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
LaF3 | CeF3
CeF4 | PrF3 | NdF2,
NdF3 | PmF3 | SmF2,
SmF3 | EuF2,
EuF3 | GdF3 | TbF3 | DyF2,
DyF3 | HoF3 | ErF3 | TmF2
TmF3 | YbF2
YbF3 | LuF3
AcF3 | ThF4 | PaF5 | UF3
UF4
UF5
UF6 | NpF4
NpF6 | PuF3
PuF6 | AmF2
AmF3 | CmF3 | BkF3 | CfF3 | EsF3 | Fm  | Md  | No  | LrF3

§ means the substance has not been made.

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