70179-68-9

Upstream product

• 935-79-5 cis-1,2,3,6-tetrahydrophthalic anhydride 
• 70179-67-8 cis-N,N,N',N'-tetramethyl-4-cyclohexene-1,2-dicarboxamide 

Downstream Products

• 70179-61-2 cis-N,N,N',N',-Tetramethyl-4-cyclohexen-1,2-bis(methylamin)-N,N'-dioxid 
• 70179-63-4 2-phenyl-2,3,4,7-tetrahydro-1(H)-isophosphindole 2-oxide 
• 70179-65-6 2-hydroxy-1,3,4,7-tetrahydroisophosphindole-2-oxide 
• 54290-41-4 1,2-bis(methylene)cyclohex-4-ene 

Relevant academic research and scientific papers

Synthesis and structure of an unexpected platinum π complex formed from substituted 1,4-diamino ligands through an elimination process

An unusual reactivity of cis-1,2-bis[(N,N-dimethylamino)methyl] cyclohexane with PtCl2 was observed, resulting in the formation of a platinum(II) π-olefin complex instead of the conventional square-planar cis PtII coordination complex with the diamino ligand. This behavior was interpreted on the basis of the steric hindrance of the dimethylamino groups whose electron lone pairs are barely accessible to a platinum atom, which can make it difficult for both dimethylamino groups to bind platinum at the same time. This complex has been physically and spectroscopically characterized and its structure has been confirmed by using X-ray diffraction analyses on single crystals.

Synthesis and structure of new trichloroplatinum π-complexes: Reactivity of nitrogen lone-pair versus C-C double bond π-electrons in ligands, effect of steric hindrance

Two trichloroplatinum π-complexes and a diammonium tetrachloroplatinate (II) salt have been unexpectedly isolated during the attempt to synthesize the corresponding cisplatinum square-planar complexes of tertiary cyclohexane 1,4-diamines. All three compounds have been physically and spectroscopically characterized, including X-ray diffraction analysis in two of the three compounds. The formation of the π-complexes instead of the diamino cis-platinum complexes could be explained as due to the steric hindrance exerted by methyl groups on the tertiary amines. So, the π-electrons of the CC double bond are more available than the electron lone pair of nitrogen atom from the amino groups. When the π-electrons of the CC from the molecule of ligand were made unavailable by transforming the cyclohexene subunit into a benzene aromatic ring, no cis-diamino dichloro platinum(II) complex nor trichloroplatinum-complexes were isolated but the corresponding tetrachloroplatinate(II) diammonium salt of the 1,4-diamino ligand.