Main Group Metal Directed Self-Assembly in a Tetrameric Trimethyltin(IV) N-nitroso-N-phenylhydroxylaminato Complex Containing an Unprecedented 20-Membered Inorganic (Carbon-Free) Metallamacrocycle

Chiral self-assembly of methyltin(IV)-naproxenates: Combining dative Sn–O bonds, secondary Sn⋯O interactions and C–H⋯O hydrogen bonding to make an inter-helical meander-shaped network and a cross-linked Z-shaped ribbon

“…Interestingly, in spite of these early findings only few organotin(IV)-macrocycles have been created [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], whereas a rich structural chemistry of stannoxane and distannoxane units containing supramolecules has been emerged [19][20][21][22][23][24][25][26][27][28][29]. Our entry in the field of organotin supramolecular chemistry began in 4 [30] and dimeric [Me 2 Sn(PhN 2 O 2 ) 2 ] 2 [31]. In the solid state, the tetrameric structure of [Me 3 Sn(PhN 2 O 2 )] 4 incorporating a 20-membered Sn 4 O 8 N 8 inorganic ring is self-assembled by dative Sn-O bonds [30], even so the [Me 2 Sn(PhN 2 O 2 ) 2 ] 2 dimer is self-assembled by weaker stannoxanic SnÁ Á ÁO interactions [31].…”

“…Our entry in the field of organotin supramolecular chemistry began in 4 [30] and dimeric [Me 2 Sn(PhN 2 O 2 ) 2 ] 2 [31]. In the solid state, the tetrameric structure of [Me 3 Sn(PhN 2 O 2 )] 4 incorporating a 20-membered Sn 4 O 8 N 8 inorganic ring is self-assembled by dative Sn-O bonds [30], even so the [Me 2 Sn(PhN 2 O 2 ) 2 ] 2 dimer is self-assembled by weaker stannoxanic SnÁ Á ÁO interactions [31]. Multinuclear multidimensional 1 H, 13 C and 119 Sn NMR data indicated that these tetrameric and dimeric supramolecules are predominantly monomeric in non-coordinating solvents at room temperature, whereas a monomer « tetramer preorganisation process exists at low temperature [32].…”

Heptacoordinate Dimethyltin(IV)cupferronato Complexes − X-ray and Solid-State NMR Structural Analysis − Hydrogen Bond Supramolecular Self-Assembly

“…Recently, we reported the synthesis and structural characterisation of N ‐nitroso‐ N ‐phenylhydroxylaminato (cupferronato, PhN 2 O 2 − , hereinafter cupf) tin(IV) complexes, such as [Me 3 Sn(cupf)] 4 ( 5 ),1 Ph 2 Sn(cupf) 2 ( 6 ), [Me 2 Sn(cupf) 2 ] 2 ( 1 ), and Sn(cupf) 4 ( 7 ) 2. We found that, depending on the number (0, 2, 3) and the nature (Me, Ph) of the substituents at the Sn IV atom, the cupferronato anion displays various coordination patterns in these molecules: chelating ( 6 , 1 , 7 ), bridging ( 5 ), and bridging‐chelating ( 1 ).…”

Preparation and structural studies on diorganotin(IV) complexes of N-nitroso-N-phenylhydroxylaminates

“…Recently, one of us reported the synthesis and structural characterisation of organotin(IV) cupferronato complexes, such as [Me 3 Sn(cupf)] 4 [5], Ph 2 Sn(cupf) 2 [6], [Me 2 Sn (cupf) 2 ] 2 [3]. It was found that, depending on the number (2,3) and the nature (Me, Ph) of the organic substituents at the tin(IV) atom, the cupferronato anion displays various coordination patters in these molecules, chelating (Scheme 2a), bridging (Scheme 2b), and bridging chelating (Scheme 2c).…”

“…It was found that, depending on the number (2,3) and the nature (Me, Ph) of the organic substituents at the tin(IV) atom, the cupferronato anion displays various coordination patters in these molecules, chelating (Scheme 2a), bridging (Scheme 2b), and bridging chelating (Scheme 2c). As a consequence, the central tin(IV) atom assumes a penta-, hexa-or hepta-coordinate state, respectively, and the resulting complexes display different coordination geometries at the central tin(IV) atom [5][6][7]. Bridging chelating coordination of the cupferronato ligand to Me 2 Sn(IV) 2+ cation gives the dimeric species (Scheme 2c) [6], whereas a bridging coordination to Me 3 Sn(IV) + affords the tetrameric complex (Scheme 2b) [5].…”