El-Hamruni, SMSözerli, SESmith, JDColes, MPHitchcock, PB2024-07-182024-07-180004-94251445-0038http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/9981The structure of a triclinic form of the organolithium derivative LiR, R = C(SiMe3)(2)(SiMe2{hpp}) (1) (hppH = 1,3,4,6,7,8,-hexahydro-2H-pyrimido[1,2-alpha] pyrimidine) comprises dimers [1](2) held together by Li center dot center dot center dot H3C interactions like those in the polymeric structure [1](infinity) of the previously described orthorhombic form. Compound 1 reacts with the chlorides MCl2 (M = Hg or Sn) to give compounds HgRCl (2) or SnRCl (3), which have been characterised by NMR spectroscopy and X-ray crystallography. The structural parameters and conformations of the metallacycles MRLn are compared with those in related compounds containing bulky organosilicon ligands with pendant nitrogen donors. Compound 3 reacts with Li[P{H}Ar*] (Ar* = 2,4,6-tBu(3)C(6)H(2)) to give the crowded phosphanide SnR(P{H} Ar*) (4).EnglishCRYSTAL-STRUCTURESMAIN-GROUPINTERMOLECULAR INTERACTIONSMOLECULAR-STRUCTURECOMPLEXESMETALSSNCLACETONITRILEDERIVATIVESArticle