title: A calixarene dendron with surface congestion at the first generation.
abstract: The X-ray structure of a dendrimeric receptor based on calixarenes showed a packed periphery in the first generation. The presence of urea groups as linkers between the calix[4]arene core and the calix[6]arene dendrons makes it a good model as an endo-receptor which is able to coordinate squarate dianions with a high association constant.
authors.affiliation: Dpto. Química Orgánica (C-I), Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain. pilar.prados@uam.es.
authors.forename: Hitos
authors.initials: H
authors.lastname: Galán
authors.forename: M Teresa
authors.initials: MT
authors.lastname: Murillo
authors.forename: Roberto
authors.initials: R
authors.lastname: Quesada
authors.forename: Eduardo C
authors.initials: EC
authors.lastname: Escudero-Adán
authors.forename: Jordi
authors.initials: J
authors.lastname: Benet-Buchholz
authors.forename: Pilar
authors.initials: P
authors.lastname: Prados
authors.forename: Javier
authors.initials: J
authors.lastname: de Mendoza