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- W4297473863 abstract "Abstract The current library of amidinate ligands has been extended by the synthesis of two novel dimethylamino‐substituted alkynylamidinate anions of the composition [Me 2 N−CH 2 −C≡C−C(NR) 2 ] − (R = i Pr, cyclohexyl (Cy)). The unsolvated lithium derivatives Li[Me 2 N−CH 2 −C≡C−C(NR) 2 ] ( 1 : R = i Pr, 2 : R = Cy) were obtained in good yields by treatment of in situ‐ prepared Me 2 N−CH 2 −C≡C−Li with the respective carbodiimides, R−N=C=N−R. Recrystallization of 1 and 2 from THF afforded the crystalline THF adducts Li[Me 2 N−CH 2 −C≡C−C(NR) 2 ] ⋅ n THF ( 1 a : R = i Pr, n =1; 2 a : R = Cy, n =1.5). Precursor 2 was subsequently used to study initial complexation reactions with selected di‐ and trivalent transition metals. The dark red homoleptic vanadium(III) tris(alkynylamidinate) complex V[Me 2 N−CH 2 −C≡C−C(NCy) 2 ] 3 ( 3 ) was prepared by reaction of VCl 3 (THF) 3 with 3 equiv. of 2 (75 % yield). A salt‐metathesis reaction of 2 with anhydrous FeCl 2 in a molar ratio of 2 : 1 afforded the dinuclear homoleptic iron(II) alkynylamidinate complex Fe 2 [Me 2 N−CH 2 −C≡C−C(NCy) 2 ] 4 ( 4 ) in 69 % isolated yield. Similarly, treatment of Mo 2 (OAc) 4 with 3 or 4 equiv. of 2 provided the dinuclear, heteroleptic molybdenum(II) amidinate complex Mo 2 (OAc)[Me 2 N−CH 2 −C≡C−C(NCy) 2 ] 3 ( 5 ; yellow crystals, 50 % isolated yield). The cyclohexyl‐substituted title compounds 2 a , 4 , and 5 were structurally characterized through single‐crystal X‐ray diffraction studies." @default.
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- W4297473863 date "2022-10-19" @default.
- W4297473863 modified "2023-10-16" @default.
- W4297473863 title "Synthesis and Complexation Study of New Aminoalkynyl−amidinate Ligands" @default.
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- W4297473863 doi "https://doi.org/10.1002/zaac.202200289" @default.
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