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Preparation, Characterization and Crystal Structure of Lead(II) Tricyanomethanide

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Preparation, Characterization and Crystal Structure of Lead(II) Tricyanomethanide

Victor M. Deflona, Cassia C. de Sousa Lopesa, Karl E. Besslera, Lincoln L. Romualdob, and Elke Niquetc

aInstituto de Qu´ımica, Universidade de Bras´ılia, BR-70904-970 Bras´ılia DF, Brazil

bDepartamento de Qu´ımica, Universidade Federal de S˜ao Carlos, BR-13560-970 S˜ao Carlos SP, Brazil

cInstitut f¨ur Anorganische Chemie der Universit¨at T¨ubingen, Auf der Morgenstelle 18, D-72076 T¨ubingen, Germany

Reprint requests to Prof. Karl E. Bessler. Fax: +55-61-32734149. E-mail: bessler@unb.br Z. Naturforsch. 61b, 33 – 36 (2006); received October 17, 2005

The so far unknown lead tricyanomethanide, Pb[C(CN)3]2, was obtained from a saturated aque- ous solution of PbCl2 and solid AgC(CN)3. Its IR spectrum and thermal behaviour are described.

The crystal structure was determined by single-crystal X-ray diffraction (trigonal, P31m, Z=3, a=1414.4(5), c=409.02(6)pm, R1=0.0249, wR2=0.0527).Two crystallographically indepen- dent ninefold coordinated Pb atoms are connected by planar tricyanomethanide ions in two distinct bridging coordination modes. The Pb−N distances range between 254 and 293 pm.

Key words: Pseudohalide, Lead, Tricyanomethanide, Crystal Structure

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