{{Chembox | 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 | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID = 2299653 | EINECS = 242-785-4 | PubChem = 3035396 | UNII_Ref = {{fdacite|correct|FDA}} | UNII = NL5ZW5U7JX | StdInChI=1S/6C2H4O2.4Be.O/c6*1-2(3)4;;;;;/h6*1H3,(H,3,4);;;;;/q;;;;;;4*+2;-2/p-6 | StdInChIKey = RKARILOACIIVIJ-UHFFFAOYSA-H | 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 | GHS_ref=[https://pubchem.ncbi.nlm.nih.gov/compound/3035396#section=Safety-and-Hazards] | GHSPictograms = {{GHS06}}{{GHS07}}{{GHS08}}{{GHS09}} | GHSSignalWord = Danger | HPhrases = {{H-phrases|301|315|317|319|330|335|350|372|411}} | PPhrases = {{P-phrases|203|260|261|264|264+265|270|271|272|273|280|284|301+316|302+352|304+340|305+351+338|316|318|319|320|321|330|332+317|333+317|337+317|362+364|391|403+233|405|501}} | MainHazards = highly toxic | FlashPt = | AutoignitionPt = | REL = Ca C 0.0005 mg/m<sup>3</sup> (as Be)<ref name=PGCH>{{PGCH|0054}}</ref> | PEL = TWA 0.002 mg/m<sup>3</sup><br/>C 0.005 mg/m<sup>3</sup> (30 minutes), with a maximum peak of 0.025 mg/m<sup>3</sup> (as Be)<ref name=PGCH/> | IDLH = Ca [4 mg/m<sup>3</sup> (as Be)]<ref name=PGCH/> }} }}

'''Basic beryllium acetate''' is the chemical compound with the formula Be<sub>4</sub>O(O<sub>2</sub>CCH<sub>3</sub>)<sub>6</sub>. This 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.

==Preparation== 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> {{cite book |last1=Moeller |first1=T. |year=1950 |chapter=Basic Beryllium Derivatives of Organic Acids |editor1-last=Audrieth |editor1-first=L. F. |title=Inorganic Syntheses, Volume 3 |volume=3 |pages=4–9 |publisher=John Wiley & Sons |doi=10.1002/9780470132340.ch2 |isbn=978-0-470-13234-0 }}</ref>

==Structure== "Basic acetates" consist of an ensemble of metal centres bound to a central oxide ion, and a collection of acetate ligands. Basic beryllium acetate has a tetrahedral Be<sub>4</sub>O<sup>6+</sup> core with acetates (CH<sub>3</sub>CO<sub>2</sub><sup>−</sup>) spanning each of the pairs of Be<sup>2+</sup> centres.<ref> {{cite journal |last1=Bragg |first1=W. H. |year=1923 |title=Crystal Structure of Basic Beryllium Acetate |journal=Nature |volume= 111|issue= 2790|pages=532 |bibcode=1923Natur.111..532B |doi=10.1038/111532a0 |author1-link=William Henry Bragg |doi-access=free }}</ref><ref> {{cite journal |last1=Pauling |first1=L. |last2=Sherman |first2=J. |year=1934 |title=The Structure of the Carboxyl Group. II. The Crystal Structure of Basic Beryllium Acetate |journal=Proceedings of the National Academy of Sciences |volume=20 |issue=6 |pages=340–5 |bibcode=1934PNAS...20..340P |doi=10.1073/pnas.20.6.340 |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 Be<sub>2</sub>O<sub>3</sub>C rings. The structure is relevant to its considerable stability (the compound is distillable at 330&nbsp;°C). 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== * Basic zinc acetate * Basic beryllium nitrate

==References== <references/>

{{clear}} {{Beryllium compounds}} {{Acetates}}

Category:Beryllium compounds Category:Acetates