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Volumn 121, Issue 9, 2004, Pages 4389-4396

Geometry, dipole moment, polarizability and first hyperpolarizability of polymethineimlne: An assessment of electron correlation contributions

Author keywords

[No Author keywords available]

Indexed keywords

DENSITY FUNCTIONAL THEORY (DFT); DIPOLE MOMENTS; HYPERPOLARIZABILITY; POLYMETHINEIMINE;

EID: 4644252514     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1775181     Document Type: Article
Times cited : (68)

References (54)
  • 26
    • 4644246712 scopus 로고    scopus 로고
    • note
    • The former was primarily used for HF and MP2, whereas we used the latter for every DFT calculations in order to take advantage of the new EDIIS algorithm.
  • 35
    • 4644297005 scopus 로고    scopus 로고
    • note
    • c=N-N= 114.6 degrees in the bent form. For the linearized octamer, all angles are equal [117.2 degrees at the MP2/6-31G(d) level].
  • 43
    • 4644370977 scopus 로고    scopus 로고
    • note
    • At the MP level, the frozen-core approximation has been used throughout the paper except when noted.
  • 49
    • 4644319853 scopus 로고    scopus 로고
    • note
    • Note that this value is unchanged when using the refined τ-shaped VSXC functional.
  • 50
    • 4644251741 scopus 로고    scopus 로고
    • note
    • It seems that the differences between MP2 and DFT Δr are not coming from a calculation artefact. Indeed, (i) for N=8, a MP2(full)/6-31G(d) calculation provides a Δr of 0.100 A, the same as the frozen-core calculation (ii) removing the linearized constraint, i.e., optimizing bent TT PMI leads to [N=8,6-31G(d)] 0.121, 0.101, 0.086, and 0.085 ̊ for HF, MP2, B3LYP, and PBEO Δr, respectively (iii) starting a B3LYP optimization on the optimal MP2 geometry, leads to the B3LYP value given in the tables. Therefore, DFT geometries are probably not local minima.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.