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Titolo:
CRYSTAL-STRUCTURES, VIBRATIONAL-SPECTRA A ND NORMAL-COORDINATE ANALYSES OF TRANS-[PTX(2)(ACAC)(2)], X=CL,BR,I,SCN
Autore:
RICKERT D; PREETZ W;
Indirizzi:
CHRISTIAN ALBRECHTS UNIV KIEL,INST ANORGAN CHEM,OLSHAUSENSTR 40 D-24098 KIEL GERMANY CHRISTIAN ALBRECHTS UNIV KIEL,INST ANORGAN CHEM D-24098 KIEL GERMANY
Titolo Testata:
Zeitschrift fur Naturforschung. B, A journal of chemical sciences
fascicolo: 10, volume: 51, anno: 1996,
pagine: 1400 - 1406
SICI:
0932-0776(1996)51:10<1400:CVANNA>2.0.ZU;2-A
Fonte:
ISI
Lingua:
GER
Keywords:
TRANS-DICHLORO-BIS(ACETYLACETONATO)PLATINUM(IV); TRANS-DIBROMO-BIS(ACETYLACETONATO)PLATINUM(IV); TRANS-DIIODO-BIS(ACETYLACETONATO)PLATINUM(IV); ANS-DITHIOCYANATO-BIS(ACETYLACETONATO)PLATINUM(IV); CRYSTAL STRUCTURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
D. Rickert e W. Preetz, "CRYSTAL-STRUCTURES, VIBRATIONAL-SPECTRA A ND NORMAL-COORDINATE ANALYSES OF TRANS-[PTX(2)(ACAC)(2)], X=CL,BR,I,SCN", Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 51(10), 1996, pp. 1400-1406

Abstract

The crystal structures of trans-[PtCl2(acac)(2)] (monoclinic, space group P2(1)/c, a=7.616(5), b=12.759(5), c=7.892(5) Angstrom, beta=118.459(5)degrees, Z=2), trans-[PtBr2(acac)(2)] (triclinic, space group <P(1)over bar>; a=7.502(5), b=7.665(5), c =8.155(5) Angstrom, alpha=114.508(5), beta=94.537(5), gamma=117.669(5)degrees, Z=1) and trans-[Pt(SCN)2(acac)(2)] (triclinic, spare group <P(1)over bar>, a=7.095(10), b=7.9393(10), c=7.963(10),c=7.9631 Angstrom, alpha=114.051(10), beta=100.955(10), gamma=100.573(10)degrees, Z=1) have been determined by single crystal X-ray diffraction analysis. The crystal structure of trans-[PtI2(acac)(2)] is known from the literature. To enhance the spectroscopic resolution, the IR and Raman spectra of the four complexes have beenmeasured at low temperature (10 K). Using the X-ray data, normal coordinate analyses based on a modified valence force field have been performed and the normal modes of vibration for the octahedral skeleton [PtX(2)O(4)] have been assigned. With a set of 19 or 23 force constants taking into account the inner-ligand vibrations a good agreement between observed and calculated frequencies has been achieved. The valence force constants are e.g. f(d) (PtCl)=2.16, f(d) (PtBr)=1.45, f(d) (PtI)=1.01, f(d) (PtS)=1.80 mdyn/Angstrom, and f(d) (PtO) ranges from 1.89to 1.91 mdyn/Angstrom.

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Documento generato il 01/12/20 alle ore 07:32:50