does this sentence work and make sense?

It is important that when the conspirators attempt to kill Caesar, they juxtapose themselves so they can communicate easily with one another.

It's not quite right. Are there only two conspirators? Are they opposites of each other?

"Juxtapose" is usually used when two ideas or inanimate objects are placed together so their differences and similarities are clear.

http://www.merriam-webster.com/dictionary/juxtapose
http://www.onelook.com/?w=juxtapose&ls=a
http://dictionary.reference.com/browse/juxtapose
Notice the example sentences among these definitions.

Yes, the sentence you provided works and makes sense grammatically. However, the accuracy of the information depends on the context and subject matter.

To determine the accuracy and clarity of this sentence, you need to consider the following points:

1. Grammar and structure: The sentence is grammatically correct, with the proper use of a subjunctive clause ("It is important that") and a relative clause ("when the conspirators attempt to kill Caesar").

2. Vocabulary and word usage: The word "juxtapose" means to place two or more things together to compare or contrast them. In the given sentence, the conspirators are juxtaposing themselves, implying that they position themselves close together for easier communication.

3. Historical context: The sentence seems to refer to a specific situation involving conspirators planning to kill Caesar. This context is likely derived from William Shakespeare's play, "Julius Caesar," where a group of conspirators plot against the titular character.

Overall, the sentence appears to describe a scenario where conspirators are strategically positioning themselves to facilitate communication during their attempt to kill Caesar.