Mechanical vs Electronic Strain: Calculated Configurations of Alkynyl-Pt(II)-Phosphine Macrocycles
Mechanical vs Electronic Strain: Calculated Configurations of Alkynyl-Pt(II)-Phosphine Macrocycles
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机械应变与电子应变:炔基-Pt(II)-膦大环化合物的计算构型
DOI:
10.1021/acs.organomet.9b00872
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发表时间:
2020
期刊:
影响因子:
2.8
通讯作者:
Michl, Josef
中科院分区:
文献类型:
--
作者:
Buchanan, Eric A.;Michl, Josef
Optimized geometries of macrocycles composed of four Pt(PR3)2linkers and four rods terminated with ethynyl or pyridyl moieties have been calculated at the PBE0/Def2-TZVPP//PBE0/Def2-SVP level of density functional theory for all combinations of cis and trans configurations at the Pt centers. For uncharged complexes with fourp,p′-bis(ethynyl)biphenyl rods and neutral Pt centers, the energy of the planar oval-shaped all-trans isomer lies 17 kcal/mol below that of the puckered square-shaped all-cis isomer. In this case, the electronic strain associated with the cis arrangement at the Pt atoms overrules the mechanical strain associated with the bending of triple bonds. For cationic complexes containing two bipyridyl and twop,p′-bis(ethynyl)biphenyl rods, with a +1 charge on each Pt center, a puckered rectangular structure with all-cis Pt centers is found to be 38 kcal/mol lower in energy than the isomer with all four Pt centers trans. The results have been analyzed in terms of three additive factors, referred to as electronic, mechanical, and electrostatic strains.
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影响因子:
5.5
作者:
Anna E. Anastasi;R. Deeth
通讯作者:
Anna E. Anastasi;R. Deeth
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
中村賀美;竹内孝江
通讯作者:
竹内孝江
影响因子:
2.8
作者:
Jan Plutnar;Cécile Givelet;C. Lemouchi;Jana Jaklová Dytrtová;I. Císařová;S. Teat;J. Michl
通讯作者:
J. Michl
影响因子:
62.1
作者:
Chakrabarty, Rajesh;Mukherjee, Partha Sarathi;Stang, Peter J.
通讯作者:
Stang, Peter J.