Original scientific paper

The Crystal Structure of Phenylmercury(II) Trifluoroacetate and the Refinement of the Crystal Structure of Phenylmercury (II) Acetate

Boris Kamenar ; Laboratory of General and Inorganic Chemistry, Faculty of Science, The University, P.O. Box 153, 41001 Zagreb, Yugoslavia
Maja Penavić ; Laboratory of General and Inorganic Chemistry, Faculty of Science, The University, P.O. Box 153, 41001 Zagreb, Yugoslavia
Andreja Hergold-Brundić ; Laboratory of General and Inorganic Chemistry, Faculty of Science, The University, P.O. Box 153, 41001 Zagreb, Yugoslavia

Abstract

The crystal structure o•f phenylmercury(I!) trifluoroace·tate
(A) has been determined by the heavy-atom method using diffractometer
X-ray diffraction data and refined by the least-
squa.res procedure to the conventiona.l R index o.f 0.051. The
structure of phenylrrnercury(II) aceta.te (B) has also been redetermined
and refined also with diffractometer data in order
to obtain better values for bond lengths and angles and to
compare them w.ith those of CA). For (B) .the refdnement converged
at an R index of 0.069. Both compounds, CA) and (B) ,
have essentially the same molecuLar structure: characteristic
coordination of mercury is digonal witih ·almost co1'linear C-Hg-0
bonds. In both structures the angles at the Hg atoms are identical
and amount to 176.6°. The Hg-C and Hg-0 bond lengths
are 205.l and 212.1 pm in (A) , and 203.8 and 208.4 pm in (B) ,
respec,tively. The effective cooi'dination number of mercury in
both structures is four: the mercury atoms, apart from being
bonded to the phenyl-carbon and tri.fluoroacetato or acetato-
oxygen atoms, are addition:a:lly sunounded in (A) by two trifluoroacetato-
oxygen a.toms, in (B) by two acetato-oxygen atoms.
The Hg .. . 0 distances vary frnm 281.9 to 295.2 pm.

Keywords

Hrčak ID:

194178

URI

https://hrcak.srce.hr/194178

Publication date:

15.2.1984.

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