Solve the following crossword puzzle: Across Clues: 2. The ubiquitous functional group that everyone knows about – chemist or not! Keto group; only with one less alkyl group and an extra double bond. They are like addresses for electrons! Neither ether nor ketone but it has features of both! Weakest electron-withdrawing effect that transmits through sigma bonds. 14. Lots of imaginary structures but the real structure is hybrid! 15. Electron pair donor. Down Clues: 1. General formula CnH2n-2. 3. AI Bronsted acids are also Mixing orbitals. 4. Proteins and peptides contain linkages of this type. 5. Units of Debye, given by charge times distance. 6. An acidic functional group. 7. Penicillin F beta antibiotic. 8. Cis or trans, E or Z, they all are isomers!
The Correct Answer and Explanation is:
Here’s a solution to the crossword puzzle based on the given clues:
Across Clues:
2. Enone
An enone has a carbonyl (keto) group with an extra double bond. It shares features of both ketones and alkenes, fitting the description of “neither ether nor ketone but has features of both.” The term enone also aligns with “addresses for electrons,” as the conjugation of the carbonyl and the double bond allows for electron delocalization. This could be what the clue refers to when mentioning weak electron-withdrawing effects that transmit through sigma bonds.
14. Resonance
“Lots of imaginary structures” likely refers to resonance structures, a concept in chemistry that describes the hybridization of multiple electron configurations. Resonance structures are not real, but their hybrid is the real structure of the molecule.
15. Ligand
An electron pair donor is typically a ligand. Ligands are molecules or ions that bind to a central metal atom or ion in coordination chemistry, donating electron pairs to form coordinate bonds.
Down Clues:
1. Alkynes
The general formula CnH2n-2 corresponds to alkynes, which are hydrocarbons containing at least one triple bond between two carbon atoms. This fits the clue perfectly.
3. Lewis Acids
Brønsted acids donate protons, but the clue refers to Lewis acids, which are electron pair acceptors. The reference to mixing orbitals likely points to the Lewis definition of acids as electron pair acceptors.
4. Peptide Bond
Proteins and peptides contain peptide bonds, which are covalent bonds formed between amino acids, involving a carboxyl group of one amino acid and the amino group of another. This fits clue 4 perfectly.
5. Dipole
Units of Debye measure the dipole moment, which is defined as the product of charge and distance. The Debye unit quantifies the separation of positive and negative charge in a molecule.
6. Carboxyl
An acidic functional group is the carboxyl group (-COOH). This group is present in carboxylic acids, which are known for their acidic properties.
7. Penicillin
Penicillin is a beta-lactam antibiotic, and “Penicillin F” specifically refers to a penicillin derivative, which also contains a beta-lactam ring. The clue refers to this specific structure.
8. Geometrical Isomerism
Cis-trans (or E-Z) isomerism refers to geometric isomerism, where molecules with the same chemical formula have different spatial arrangements of their atoms or groups. This fits with the clue “cis or trans, E or Z” isomers.
In summary, the puzzle contains key organic chemistry concepts like resonance, ligands, alkynes, peptide bonds, and more, with solutions aligned with known chemical terminology.
