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Structure, conformation and hydrogen bonding of two amino-cycloalkanespiro-5-hydantoins

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Todorov P., Petrova R., Naydenova E., Shivachev B.

Open Chemistry

2009

vol. 7

issue 1

14-19

The crystal structures of 3-amino-cycloheptanespiro-4′-imidazolidine-2′,5′-dione (I) {systematic name: 3-amino-1,3-diazaspiro[4.6] undecane-2,4-dione} and 3-amino-cyclooctanespiro-4′-imidazolidine-2′,5′-dione (II) {systematic name: 3-amino-1,3-diazaspiro[4.7] dodecane-2,4-dione}, have been determined. In both compounds the polar hydantoin groups cause molecules to aggregate via N-H...O and N-H...N interactions, forming a layer structure, in which the cycloalkane rings project outwards from the central, more polar, region. The observed molecular structure is compared with that calculated by density functional theory methods. [...]

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1 Open Chemistry

1 2009

1 Naydenova E.

1 Petrova R.

1 Shivachev B.

1 Todorov P.

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Structure, conformation and hydrogen bonding of two amino-cycloalkanespiro-5-hydantoins