Tin(II) and Tin(IV) Compounds with Scorpion‐Shaped Ligands – Intramolecular N→Sn vs. Intermolecular O→Sn Coordination

Abstract The syntheses of new potentially tetradentate ligands of the type RN(CH 2 CMe 2 OH) 2 ( 1 , R = Me 2 NCH 2 CH 2 ; 2 , R = MeOCH 2 CH 2 ), their tin(II) derivatives RN(CH 2 CMe 2 O) 2 Sn ( 3 , R = Me 2 NCH 2 CH 2 ; 4 , R = MeOCH 2 CH 2 ), the pentacarbonyltungsten complexes RN(CH 2 CMe 2 O) 2 SnW(CO) 5 ( 5 , R = Me 2 NCH 2 CH 2 ; 6 , R = MeOCH 2 CH 2 ) and their oxidation products with bromine, RN(CH 2 CMe 2 O) 2 SnBr 2 ( 7 , R = Me 2 NCH 2 CH 2 ; 8 , R = MeOCH 2 CH 2 ), are reported. The compounds were characterized by multinuclear NMR spectroscopy, elemental analysis, electrospray ionization mass spectrometry and single‐crystal X‐ray diffraction analysis. DFT calculations on compounds 3 , 7 and 8 suggest the preference of dimeric over monomeric structures.