Abstract
Iron(III) phosphites, vic. Fe2(HPO3)3·9 H2O, FeH3P2O6·3 H2O, FeH6P3O9·H2O and Fe4H33P15O45·6 H2O were studied by means of powder X-ray, thermographic, IR and UV spectroscopy methods and by measurement of magnetic susceptibility. From the results obtained, and from analogy with phosphites studied earlier, the following structural model can be proposed: in the compounds studied, every iron atom is surrounded by six oxygen atoms of the water molecules and phosphite or, polyorthophosphite anions which form a weak ligand field of approximately octahedral symmetry. In Fe2(HPO3)3·9 H2O, symmetry of the anion is decreased from the point group C3v to the Cs group. This anion is characterised by two bonding distances between phosphorus and oxygen atoms,r PO=1,46 Å andr PO 2=1,50 Å, the respective force constants beingK PO=8.7 mdyn/Å andK PO2=7.1 mdyn/Å. Three types of hydrogen bonds occur in the crystal lattices of the compounds studied. The weakest bond (bond lengthr=2.86–2.88 Å, bond energyE=4.6–5.0 kcal/bond) is formed between molecules of hydrate water, its energy approaching that of the hydrogen bond in liquid water. The stronger hydrogen bond (r=2.67–2.70 Å,E=5.7 to 8.0 kcal/bond) is found between water molecules and phosphite or polyorthophosphite anions. The strongest hydrogen bond (r=2.55–2.64 Å) is formed by polyorthophosphite anions, linking hydroxyl groups to oxygen atoms bound to different phosphorus atoms.
Similar content being viewed by others
Literatur
M. Ebert undL. Kavan, Z. Chem., in Durck.
J. Podlaha, Coll. Czech. Chem. Commun.29, 1128 (1964).
H. Rose, Pogg. Ann.9, 23 (1827).
C. Rammelsberg, J. Chem. Soc.20, 358 (1867).
M. Ebert undM. Pelikánová, Mh. Chem.105, 11 (1974).
M. Ebert undJ. Eysseltová, Mh. Chem.105, 1030 (1974).
M. Ebert, J. Eysseltová undA. Rottová, Coll. Czech. Chem. Commun.35, 1824 (1970).
M. Ebert, Chemiker-Ztg.44, 839 (1970).
M. Ebert, J. Eysseltová undJ. Čipera, Chem. Průmysl17, 283 (1967).
M. Ebert, J. Eysseltová undJ. Čipera, Chem. Průmysl18, 239 (1968).
M. Ebert undJ. Eysseltová, Chem. Zvesti22, 862 (1968).
M. Ebert undJ. Eysseltová, Coll. Czech. Chem. Commun.35, 545 (1970).
A. B. P. Lever, Inorganic Electronic Spectroscopy. London: Elsevier. 1969.
G. Brun, Rev. Chim. Min.7, 413 (1970).
B. Barnoyer, G. Brun undM. Maurin, Rev. Chim. Min.7, 941 (1970).
A. Novak, Structure and Bonding18, 177 (1974).
E. A. Robinson, Canad. J. Chem.41, 3021 (1963).
W. J. Lehmann, J. Mol. Spectr.7, 261 (1961).
R. M. Badger, J. Chem. Phys.2, 128 (1934).
R. M. Badger, J. Chem. Phys.3, 710 (1935).
W. Gordy, J. Chem. Phys.14, 305 (1946).
L. Jenšovský, Z. Chem.2, 334 (1962).
M. Ebert undJ. Eysseltová, Mh. Chem.103, 188 (1972).
M. Ebert undJ. Eysseltová, Mh. Chem.100, 553 (1969).
A. V. Karjakin undG. A. Krivencova, Sostojanije vody v organičeskich i neorganičeskich sojedinenijach. Moskva: Nauka. 1973.
J. J. Efimov undJ. I. Naberuchin, J. Strukt. Khim. [russ.]12, 591 (1971).
G. V. Juchnevič undA. V. Karjakin, Dokl. Akad. Nauk SSSR156, 681 (1964).
A. V. Karjakin undG. A. Muradova, J. Fiz. Khim. [russ.]42, 2735 (1968).
D. J. Samojlov, Struktura vodnych rastvorov elektrolitov i gidratacija ionov. Moskava: Izd. AN SSSR. 1957.
M. Ebert undJ. Eysseltová, Sammelband der 26. Konferenz der Tschechischen chemischen Gesellschaft, České Budějovice, 1970.
M. Ebert undL. Kavan, Chem. Zvesti, in Druck.
M. Ebert undJ. Podlaha, Nature188, 657 (1960); J. Neorg. Khim. [russ.]7, 2185 (1962).
M. Ebert undJ. Podlaha, Coll. Czech. Chem. Commun.26, 753 (1961).
J. W. Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry, Vol. XIV. London: Longmans. 1935.
A. Jílek undJ. Kota, Vážková analysa a elektroanalysa II. Praha: Techn. věd. vyd. 1951.
O. Tomíček, Kvantitativní analysa. Praha: SZN. 1963.
F. Vilím, Čechoslov. Čas. Fyz.5, 416 (1955).
J. Julák, Dissertation, Karls-Universität, Praha. 1972.
J. Lewis undR. C. Wilkins, Modern Coordination Chemistry. New York: Interscience. 1960.
Author information
Authors and Affiliations
Additional information
Mit 2 Abbildungen
Rights and permissions
About this article
Cite this article
Ebert, M., Kavan, L. Untersuchung von Eisen(III)-phosphiten im Hinblick auf die Wasserstoffbindungen. Monatshefte für Chemie 106, 1499–1512 (1975). https://doi.org/10.1007/BF00913625
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00913625