Basic beryllium acetate: Difference between revisions

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 450708458

| ImageFile = Basic-beryllium-acetate-3D-balls.png

| ImageSize = 240

| ImageAlt = Beacetate.png

| SystematicName = Hexa-μ-acetato(O,O')-μ4-oxo-tetraberyllium(II)

| OtherNames = Beryllium oxyacetate<BR>Beryllium oxide acetate<BR>Basic beryllium acetate

| Section1 = {{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 19049-40-2

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = NL5ZW5U7JX

| PubChem = 3035396

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 2299653

| EINECS = 242-785-4

| SMILES = O1[C-](C)O[Be+2]([O-2]456)(O[C-](C)O2)O[C-](C)O[Be+2]34O[C-](C)O[Be+2]25O[C-](C)O[Be+2]16O[C-](C)O3}}

| Section2 = {{Chembox Properties

| Formula = {{chem|C|12|H|18|Be|4|O|13}}

| MolarMass = 406.3122 g/mol

| Appearance = colorless

| Density =

| MeltingPtC = 285

| MeltingPt_notes =

| BoilingPtC = 330

| BoilingPt_notes =

| pKa =

| SolubleOther = soluble

| Solvent = chloroform}}

| Section3 = {{Chembox Hazards

| MainHazards = highly toxic

| FlashPt =

| AutoignitionPt =

| REL = Ca C 0.0005 mg/m³ (as Be)<ref name=PGCH>{{PGCH|0054}}</ref>

| PEL = TWA 0.002 mg/m³<br/>C 0.005 mg/m³ (30 minutes), with a maximum peak of 0.025 mg/m³ (as Be)<ref name=PGCH/>

| IDLH = Ca [4 mg/m³ (as Be)]<ref name=PGCH/>

}}

'''Basic beryllium acetate''' is the [[chemical compound]] with the formula Be₄O(O₂CCH₃)₆. This [[Chemical compound|compound]] adopts a distinctive structure, but it has no applications and has been only lightly studied. It is a colourless solid that is soluble in organic solvents.

It can be prepared by treating [[basic beryllium carbonate]] with hot [[acetic acid]].

: {{Chem2|2 Be2CO3(OH)2 + 6 AcOH → Be4O(AcO)6 + 5 H2O + 2 CO2}}

Basic beryllium acetate is insoluble in water but soluble in [[chloroform]], consistent with it being nonpolar. It melts and sublimes in a vacuum without decomposition.<ref>

|volume=3

|pages=4–9

|isbn=978-0-470-13234-0

"Basic [[acetates]]" consist of an ensemble of metal centres bound to a central oxide ion, and a collection of acetate [[ligand]]s. Basic beryllium acetate has a tetrahedral Be₄O⁶⁺ core with acetates (CH₃CO₂⁻) spanning each of the pairs of Be²⁺ centres.<ref>

|author1-link=William Henry Bragg

|doi-access=free

}}</ref><ref>

|volume=20 |issue=6 |pages=340–5

|pmid=16587899

|pmc=1076415

|url=http://authors.library.caltech.edu/11983/1/PAUpnas34b.pdf|author1-link=Linus Pauling

|doi-access=free

}}</ref> It consists of interlocking six-membered Be₂O₃C rings. The structure is relevant to its considerable stability (the compound is distillable at 330&nbsp;°C).

[[File:Beacetate.png|center|250px|Schematic structure of basic beryllium acetate]]

==Uses==

The solubility of the salt in organic solvents (chloroform) is useful to extract and purify beryllium rich fractions for many purposes.

Basic beryllium acetate single crystals can easily be grown and are helpful to align x-ray diffractometers and also as a reference in protein crystallography.

==See also==

* [[Zinc acetate|Basic zinc acetate]]

* [[Basic beryllium nitrate]]

{{clear}}

{{Acetates}}