Synthesis and structural characterization of four dichloridobis(cyclopropylalkynylamidine)metal complexes

Abstract

Transition-metal amidine complexes of the type MCl2[c-C3H5—C≡C—C(NR′)(NHR′)]2 (M = Mn, Fe, Co) are readily available by a two-step synthesis starting from cyclo­proplacetyl­ene.

Synthesis and Structural Characterization of Divalent Transition Metal Alkynylamidinate Complexes

“…In the first step the easily accessible lithium cyclopropylethynylamidinate precursors Li[ c ‐C 3 H 5 −C≡C−C(NR) 2 ] ⋅ THF (R= i Pr, Cy) [36] were prepared and structurally characterized. Further in the course of this study, a surprising variety of transition metal and lanthanide alkynylamidinate complexes terminated by cyclopropyl groups could by synthesized and fully characterized [37–44] . In this contribution we now report the synthesis and characterization of several new first and second row transition metal complexes comprising the cyclopropylethynylamidinate ligands.…”

“…Further in the course of this study, a surprising variety of transition metal and lanthanide alkynylamidinate complexes terminated by cyclopropyl groups could by synthesized and fully characterized. [37][38][39][40][41][42][43][44] In this contribution we now report the synthesis and characterization of several new first and second row transition metal complexes comprising the cyclopropylethynylamidinate ligands.…”

Synthesis and Complexation Study of New Aminoalkynyl−amidinate Ligands

“…[21,22] Starting from the readily available lithium cyclopropylethynylamidinate precursors Li[c-C 3 H 5 À C�CÀ C(NR) 2 ] • THF (R= i Pr, Cy), [23] a surprising variety of transition metal and lanthanide alkynylamidinate complexes could be synthesized and fully characterized. [24][25][26][27][28][29][30] In this contribution we now report the synthesis of the new aminofunctionalized alkynylamidinate ligands [Me 2 NÀ CH 2 À C�CÀ (NR) 2 ] À (R = i Pr, Cy) as well as an initial complexation study with selected transition metals (vanadium, iron, and molybdenum).…”

“…Our own contributions to the coordination chemistry of alkynylamidinate anions in recent years focused on alkynylamidinate anions with R=cyclopropyl ( c ‐C 3 H 5 ) because of the unique electronic properties of the cyclopropyl group [21,22] . Starting from the readily available lithium cyclopropylethynylamidinate precursors Li[ c ‐C 3 H 5 −C≡C−C(NR) 2 ] ⋅ THF (R= i Pr, Cy), [23] a surprising variety of transition metal and lanthanide alkynylamidinate complexes could be synthesized and fully characterized [24–30] . In this contribution we now report the synthesis of the new amino‐functionalized alkynylamidinate ligands [Me 2 N−CH 2 −C≡C−(NR) 2 ] − (R = i Pr, Cy) as well as an initial complexation study with selected transition metals (vanadium, iron, and molybdenum).…”