ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

The structure of tetrahedral ions (MO₄)^n-

F. Hanic

Slovak Academy of Sciences, Bratislava

Abstract: The covalent bonds M.sbd.O' in the tetrahedral ions (MO₄)^n-, (M = Si, P, As, V, Se, Cr, and Cl), are equiv. and have a multiple character between 1 and 2 that can be expressed: N = 1 + [(r_M-O - r_M-O')/(r_M-O - r_M=O)]. r_M-O' is the experimentally detd. length of the covalent bond in (MO₄)^n-, and r_M-O and r_M=O are the lengths of the simple and covalent bonds calcd. as follows: r_M-O = 2√r_M.r_O - β|x_M - x_O|r_M and r_O are covalent radii of the central atom and O, resp., and xM and x_O are the corresponding electronegativitics. Const. β is 0.030 for the double bond and 0.053 for the single bond. For the individual (MO₄)^n- ions the following multi plicities were calcd. for the covalent bonds: SiO₄^4- 1.21, PO₄^3- 1.41, VO₄^3- 1.37, AsO₄^3- 1.28, SO₄^2- 1.53, CrO₄^2- 1.59, SeO4^2- 1.45, and ClO4^- 1.49. 75 references.

Full paper in Portable Document Format: 105a268.pdf (in Slovak)

Chemical Papers 10 (5) 268–281 (1956)