In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Double-helical dinuclear bis(dipyrromethene) complexes Formed by self-assembly, published in 2000-11-17, which mentions a compound: 2199-44-2, mainly applied to transition metal dipyrromethene complex preparation; pyrromethene transition metal complex preparation; crystal structure transition metal dipyrromethene complex; helix double transition metal dipyrromethene complex preparation, Formula: C9H13NO2.
Bis(dipyrromethene) ligands linked by an alkyl spacer between β and β’ positions (I; n = 1, 2, 3) give helical dimers or monomers, dependent upon the length of the alkyl linker, upon complexation. Ligands consisting of methylene, ethylene, and propylene linkers -(CH2)n- (n = 1, 2, and 3) give helical dimers, while longer linking chains (n = 4, 5, or 6) give monomers or mixtures of dimers and monomers. X-ray crystal structures of the dimeric Zn complexes (n = 1, 2, and 3) reveal that the angles between dipyrromethene planes and the extent of helicity in the complexes differ as the length of the linker varies. The extent of helicity was assessed and is dependent upon the length and, specifically, the conformational preferences of the alkyl spacer unit. The presence of an ethylene linker gave complexes of greatest helicity. The use of a methylene spacer gave less helical structures upon complexation, while propylene spacers gave only slightly helical complexes. These studies identify the crucial importance that the conformational preferences of the β-β’ alkyl spacer group plays in the coordination algorithm of self-assembly to form dipyrromethene based complexes.
Here is just a brief introduction to this compound(2199-44-2)Formula: C9H13NO2, more information about the compound(Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate) is in the article, you can click the link below.
Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com