Syntheses and Structures of Group 14 1,3-Dimetallacyclobutanes

• Published in: Organometallics Vol. 22; no. 22; pp. 4604 - 4609
• Main Authors: Leung, Wing-Por, Ip, Queenie Wai-Yan, Wong, Suk-Yu, Mak, Thomas C. W
• Format: Journal Article
• Language: English
• Published: WASHINGTON American Chemical Society 27.10.2003; Amer Chemical Soc
• Subjects: Chemistry; Chemistry, Inorganic & Nuclear; Chemistry, Organic; Physical Sciences; Science & Technology; LIGANDS; MOLECULAR-STRUCTURE; COMPLEXES; PHOSPHORANIMINE; CRYSTAL; X-RAY STRUCTURES; SN; LITHIUM
• ISSN: 0276-7333; 1520-6041
• DOI: 10.1021/om0340793

Metalation of 2,6-lutidine-functionalized bis(phosphoranimines) (Me3SiNPPr i 2CH2)2C5H3N-2,6 (2) using MgBu2 in THF yielded the magnesium compound [Mg{(Me3SiNPPr i 2CH)2C5H3N-2,6}THF] (3). Further reaction of 3 with 1 equiv of SnCl2 afforded the tin(II) compound [{2-{Sn{C(Pr i 2PNSiMe3)}}-6-{Sn{CH(Pr i 2PNSiMe3)}Cl}}C5H3N]2 (4). Treatment of 2 with 2 equiv of Pb{N(SiMe3)2}2 afforded the lead(II) compound [{2-{Pb{C(Pr i 2PNSiMe3)}}-6-{Pb{CH(Pr i 2PNSiMe3)}N(SiMe3)2}}C5H3N]2 (5). X-ray structural analysis revealed that 4 and 5 consist of a 1,3-dimetallacyclobutane and two metal(II) alkyl moieties. Similar reaction of 3 with 1 equiv of GeCl2(dioxane), however, yielded the germanium(II) compound (6) without forming a similar 1,3-digermacyclobutane ring.