Syntheses and crystal structures of the first bromofluorides in niobium cluster chemistry:: Nb6Br8F7 and Na2NbF6-(Nb6Br4F11)

被引：20
作者：
Cordier, S [1 ]
Hernandez, O [1 ]
Perrin, C [1 ]
机构：
[1] Univ Rennes 1, UMR 6511 CNRS, Lab Chim Solide & Inorgan Mol, Inst Chim Rennes, F-35042 Rennes, France
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2001年 / 158卷 / 02期
关键词：
bromofluorides in niobium cluster chemistry; solid state synthesis; single-crystal X-ray diffraction; crystal structures;
D O I：
10.1006/jssc.2001.9121
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We have synthesized by solid state chemistry and structurally characterized by single-crystal X-ray diffraction two new cluster compounds based on Nb6L12L6a units (L = Br and/or F), namely, Nb6Br8F7 and Na2NbF6-(Nb6Br4F11). Nb6Br8F7 crystallizes in the trigonal system (space group, R3c; Z = 6; a = 9.6373 (6) Angstrom; c = 35.415 (2) Angstrom; R = 0.0359) while Na2NbF6-(Nb6Br4F11) (space group, Pm3m; Z = 1; a = 8.1765 (6) Angstrom; R = 0.0325) crystallizes in the cubic system, In both structures, fluorine and bromine are randomly distributed on the inner ligand positions (L-1) that edge bridge the octahedral Nb, cluster, In Nb,Sr,F,, bromine fully occupies the apical ligand positions (L-a) whereas these positions are fully occupied by fluorine in Na2NbF-(Nb6Br4F11). The structural correlation between both compounds is discussed as well as the specificity of fluorine in the niobium cluster chemistry, (C) 2001 Academic Press.
引用
收藏
页码：327 / 333
页数：7
相关论文
共 26 条
[1]   CHEMISTRY OF NIOBIUM AND TANTALUM .67. STRUCTURE OF TANTALUM HALIDES TA6CL15 AND TA6BR15 [J].
BAUER, D ;
VONSCHNE.HG .
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1968, 361 (5-6) :259-&
[2]   AN EMPIRICAL CORRECTION FOR ABSORPTION ANISOTROPY [J].
BLESSING, RH .
ACTA CRYSTALLOGRAPHICA SECTION A, 1995, 51 :33-38
[3]  
BOURNONVILLE MB, 1986, J SOLID STATE CHEM, V62, P212
[4]   CRYSTAL STRUCTURE OF NIOBIUM MONOXIDE [J].
BOWMAN, AL ;
WALLACE, TC ;
YARNELL, JL ;
WENZEL, RG .
ACTA CRYSTALLOGRAPHICA, 1966, 21 :843-&
[5]   SIRWARE [J].
Cascarano, G. ;
Altomare, A. ;
Giacovazzo, C. ;
Guagliardi, A. ;
Moliterni, A. G. G. ;
Siliqi, D. ;
Burla, M. C. ;
Polidori, G. ;
Camalli, M. .
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 1996, 52 :C79-C79
[6]   CRYSTALLOCHEMICAL AND SPECTROSCOPIC STUDY OF FLUORONIOBATES MNBF6 WITH M=MG, CA, MN, FE, CO, NI, ZN AND CD [J].
CHASSAING, J ;
MONTEIL, C ;
BIZOT, D .
JOURNAL OF SOLID STATE CHEMISTRY, 1982, 43 (03) :327-333
[7]  
Cordier S, 1995, CROAT CHEM ACTA, V68, P781
[8]   The first chlorofluoride in niobium cluster chemistry structure of the double salt:: NaxNb7F21-yCly (x ∼ 2; y ∼ 8) [J].
Cordier, S ;
Simon, A .
SOLID STATE SCIENCES, 1999, 1 (04) :199-209
[9]   Structural influences of fluorine ligand in niobium cluster chemistry:: crystal structures of KNb6Cl10F5 and CsNb6Cl8F7 [J].
Cordier, S ;
Hernandez, O ;
Perrin, C .
JOURNAL OF FLUORINE CHEMISTRY, 2001, 107 (02) :205-214
[10]   CRYSTALLOCHEMISTRY OF SOME NEW NIOBIUM BROMIDES WITH (NB6BR18) UNITS - STRUCTURES OF CSERNB6BR18 AND CS2EUNB6BR18 [J].
CORDIER, S ;
PERRIN, C ;
SERGENT, M .
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1993, 619 (04) :621-627
123