메뉴 건너뛰기




Volumn 562, Issue 1, 1998, Pages 61-69

Niobium(I) and tantalum(I) tetracarbonyl derivatives containing nitrogen ligands

Author keywords

Carbonyls; Niobium; Nitrogen ligands; Tantalum

Indexed keywords


EID: 0032503795     PISSN: 0022328X     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0022-328X(98)00359-3     Document Type: Article
Times cited : (10)

References (74)
  • 22
    • 0000312977 scopus 로고    scopus 로고
    • Recently, evidence on the existence of stable, substituted carbonyl derivatives of niobium(0) and tantalum(0) has been reported: (a)
    • Recently, evidence on the existence of stable, substituted carbonyl derivatives of niobium(0) and tantalum(0) has been reported: (a) M.A. Koeslag, M.C. Baird, S. Lovelace, W.E. Geiger, Organometallics 15 (1996) 3289.
    • (1996) Organometallics , vol.15 , pp. 3289
    • Koeslag, M.A.1    Baird, M.C.2    Lovelace, S.3    Geiger, W.E.4
  • 27
  • 53
    • 85033522139 scopus 로고    scopus 로고
    • 3]Cl even in the presence of a large excess of hydrogen chloride.
    • 3]Cl even in the presence of a large excess of hydrogen chloride.
  • 55
    • 85033539012 scopus 로고    scopus 로고
    • NOTE
    • In the course of the structural work on this compound we noted a phase transition to a subgroup of the k type (IIb) [T. Hahn (Ed.), International Tables for Crystallography, vol A, Kluwer Academic Publishers, Dordrecht, 1989.] with concomitant doubling of the unit cell volume upon cooling from room temperature to about 200 K, see Section 4. Work on this phase transition is still in progress, and detailed results will be given in a forthcoming publication. The results presented in this article refer to the single-crystal structure determination at 203 K.
  • 56
    • 85033539963 scopus 로고    scopus 로고
    • NOTE
    • A referee of this paper encouraged us to comment on the statistically significant differences between the two symmetrically independent molecules. Obviously, such differences may be either due to systematic errors not reflected in the estimated standard deviations, or to differences in the crystalline environment [see, e.g. J. Bernstein, in: A. Domenicano, I. Hargitai (Eds.), Accurate Molecular Structures, Oxford University, New York, 1992, pp. 469-497]. The latter are often referred to as 'packing effects': recent results indicate that in the case of metal complexes such packing effects are accompanied by changes in bond angles [T. Wagner, U. Englert, Struct. Chem., in press] and even in bond distances [A. Martin, A.G. Orpen, J. Am. Chem. Soc. 118 (1996) 1464]. Based on data from the Cambridge Structural Database, Martin and Orpen have obtained a standard deviation in the order of magnitude of 0.01 Å for the case of metal-chlorine bonds.
  • 57
    • 0004226006 scopus 로고
    • University of Utrecht, The Netherlands
    • A.L. Spek, PLATON-94, University of Utrecht, The Netherlands, 1994.
    • (1994) PLATON-94
    • Spek, A.L.1
  • 59
    • 85033538299 scopus 로고    scopus 로고
    • NOTE
    • The values of the covalent radii of the metals have been calculated by subtracting the Pauling covalent radius of the carbon atom in CO (0.64 Å), of the nitrogen atom involved in a single bond (0.70 Å) and of a halogen atom (F, 0.64 Å; Br, 1.14 Å; 1, 1.33 Å) [L. Pauling, The Nature of the Chemical Bond, 3rd ed., Cornell University Press, Ithaca, New York, 1960, p. 225] from the M-CO, M-N or M-X internuclear separation of the appropriate complexes, respectively.
  • 70
    • 85033525103 scopus 로고    scopus 로고
    • A complete list of all atomic coordinates, anisotropic displacement parameters, and interatomic distances are available as Supplementary Material and have been deposited with the Fachinformationszentrum Karlsruhe, D-76344, Eggenstein-Leopoldshafen (FRG), depository number CSD-407516.
    • A complete list of all atomic coordinates, anisotropic displacement parameters, and interatomic distances are available as Supplementary Material and have been deposited with the Fachinformationszentrum Karlsruhe, D-76344, Eggenstein-Leopoldshafen (FRG), depository number CSD-407516.
  • 71
    • 85033540138 scopus 로고    scopus 로고
    • -3.
    • -3.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.