Buy article online - an online subscription or single-article purchase is required to access this article.
Download citation
Download citation
link to html
The crystal structures of phosphonoacetic acid, C2H5O5P [H3AP, (I)], and its salts potassium phosphonoacetate hydrate, K+.C2H4O5P.H2O [KH2AP.H2O, two crystalline forms, α, (II), and β, (III)], ammonium phosphonoacetate, NH4+.C2H4O5P [(NH4)H2AP, (IV)], lithium phosphonoacetate, Li+.C2H4O5P [LiH2AP, (V)], sodium phosphonoacetate dihydrate, Na+.C2H4O5P.2H2O [NaH2AP.2H2O, (VI)], dipotassium phosphonoacetate, 2 K+.C2H3O5P2− [K2HAP, (VII)], diammonium phosphonoacetate, 2NH4+.C2H3O5P2− [(NH4)2HAP, (VIII)], disodium phosphono­acetate dihydrate, 2Na+.C2H3O5P2−.2H2O [Na2HAP.2H2O, (IX)], triammonium phosphonoacetate dihydrate, 3NH4+.C2H2O5P3−.2H2O [(NH4)3AP.2H2O, (X)], and trisodium phosphonoacetate decahydrate, 3Na+.C2H2O5P3−.10H2O [Na3AP.10H2O, (XI)], are described. In all cases, one of the phosphonate O atoms (denoted O2) is nearly antiperiplanar to the carboxylic C1 atom. There is also an evident tendency for the plane through the carboxyl group to be almost perpendicular to the plane through the methylene C atom C2, P and O2. In the acid anions the dihedral angles between these planes range from 75.6 (1)° in (V) to 89.0 (1)° in (VII) whereas in the free acid, (I), this angle is 50.6 (1)°.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks default, I, II, III, IV, V, VI, VII, VIII, IX, X, XI

CCDC references: 128393; 128394; 128395; 128396; 128397; 128398; 128399; 128400; 128401; 128402; 128403

-1

Subscribe to Acta Crystallographica Section C: Structural Chemistry

The full text of this article is available to subscribers to the journal.

If you have already registered and are using a computer listed in your registration details, please email support@iucr.org for assistance.

Buy online

You may purchase this article in PDF and/or HTML formats. For purchasers in the European Community who do not have a VAT number, VAT will be added at the local rate. Payments to the IUCr are handled by WorldPay, who will accept payment by credit card in several currencies. To purchase the article, please complete the form below (fields marked * are required), and then click on `Continue'.
E-mail address* 
Repeat e-mail address* 
(for error checking) 

Format*   PDF (US $40)
In order for VAT to be shown for your country javascript needs to be enabled.

VAT number 
(non-UK EC countries only) 
Country* 
 

Terms and conditions of use
Contact us

Follow Acta Cryst. C
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds