Structure of non-symmetric lithium amidinate complexes prepared by addition of lithium amides to various nitriles

Hexanuclear Wheel‐Shaped Lithium N‐(2,6‐Diisopropylphenyl)‐N′‐(2‐pyridylethyl)benzamidinate

“…The Li–N bond lengths vary in a very narrow range between 200.9(3) and 207.8(3) pm, the larger distances are observed to the 2‐pyridyl bases. These values are in the expected range as also found for complexes with bidentate ( syn‐E )‐isomeric amidinates and tetra‐coordinate central lithium atoms , , . Superbulky N ‐bound aryl groups lead to a significant elongation of the Li–N bonds with stabilizing π‐interactions to an aryl group .…”

“…Dinuclear lithium amidinates are only observed with ( syn‐E )‐isomeric amidinate ligands as depicted in Scheme . Derivative A is the dimer of the classical ( syn‐E )‐isomer,, whereas in complexes B and C the lithium ions are bound between two amidinate ligands. Coordination polymers with strand structures have been observed for amidinate ligands with R as 3‐pyridyl and 4‐pyridyl groups .…”

Blue emissive amidinate-based tetra-coordinated boron compounds

“…The N1–Li1–N2 and an average N–Li1–O angle was 68.3 (1) and 120.34°. The observed bond length and bond angle values of 4Li·2THF are unexceptional from earlier reported amidinate ligated lithium salts [(2,6- i PrC 6 H 3 N) 2 CHLi·2THF, 13 (2,6- i PrC 6 H 3 N) 2 C( n -C 4 H 9 )Li·2THF, 14 and (2,6- i PrC 6 H 3 N)(SiMe 3 )C( n -C 4 H 9 )Li·2THF] 15 notwithstanding the changes in the steric factors. The orientation of aryl substitution with respect to the N1–C–N2–Li1 plane in 4Li·2THF is nearly orthogonal (88.96°).…”