Crystal structure of poly[[(1,3-dimethyl-2-imidazolidinone-κ1O) zinc(II)]-μ-furan-2,5-dicarboxylato-κ4O,O′:O′′,O′′′], [Zn(C5H10N2O)(C6H2O5)], C22H24N4O12Zn2

Song, Jian; Xie, Peng; Qiao, Qiao

doi:10.1515/ncrs-2014-9128

Cited by 1 publication

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“…The most widely used saturated cyclic urea ligand is 1,3-dimethyl-2-imidazolidinone (DMI), which serves as a highly polar solvent with high thermal and chemical stability . Consequently, it was used several times as a coordinating solvent for the preparation and crystallization of transition metal complexes, affording the X-ray crystal structures of extended coordination networks of magnesium(II), , zinc(II), − manganese(II), zirconium(IV), cadmium(II), , and holmium(III) complexes containing the DMI ligand. Monometallic complexes were isolated with samarium, and the Sm(III) and Sm(II) complexes [{(SIMe)O} 5 Sm(OTf) 2 ]OTf and [{(SIMe)O} 4 SmI 2 ] ( 567 , Chart ) were synthesized and structurally characterized.…”

Section: N-heterocyclic Carbene Adducts Of Group 16 Elementsmentioning

confidence: 99%

N-Heterocyclic Carbene Adducts of Main Group Elements and Their Use as Ligands in Transition Metal Chemistry

2019

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N-Heterocyclic carbenes (NHC) are nowadays ubiquitous and indispensable in many research fields, and it is not possible to imagine modern transition metal and main group element chemistry without the plethora of available NHCs with tailor-made electronic and steric properties. While their suitability to act as strong ligands toward transition metals has led to numerous applications of NHC complexes in homogeneous catalysis, their strong σ-donating and adaptable π-accepting abilities have also contributed to an impressive vitalization of main group chemistry with the isolation and characterization of NHC adducts of almost any element. Formally, NHC coordination to Lewis acids affords a transfer of nucleophilicity from the carbene carbon atom to the attached exocyclic moiety, and low-valent and lowcoordinate adducts of the p-block elements with available lone pairs and/or polarized carbon-element π-bonds are able to act themselves as Lewis basic donor ligands toward transition metals. Accordingly, the availability of a large number of novel NHC adducts has not only produced new varieties of already existing ligand classes but has also allowed establishment of numerous complexes with unusual and often unprecedented element−metal bonds. This review aims at summarizing this development comprehensively and covers the usage of N-heterocyclic carbene adducts of the p-block elements as ligands in transition metal chemistry.

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