Organic Chemistry: A stable cyclic constitutional isomer of cyclopentane. - General

[IMG]http://img202.imageshack.us/img202/1936/cyclopentane.png[/IMG] This is what cyclopentane looks like. As far as I can tell, there's no way to rearrange it into another cyclic structure without some kind of weird chain branching off of it. [IMG]http://img21.imageshack.us/img21/248/isomermaybe.png[/IMG] This seems like the only possibility. Am I right or not? :science:

Yes all those sciency things will make that shape.

I'd call your out for not putting in much content, but this is fairly awesome so cheers to you.

i don't know what you mean by 'rearrange it', but surely cyclohexane would be correct if you consider cyclobutane to be.

It's really fairly basic stuff, too. When it makes you start drawing stuff named "4-(1-Methylethyl)heptane(4-Isopropylheptane)" that it becomes a pain in the ass.

[QUOTE=Zinayzen;21461620]It's really fairly basic stuff, too. When it makes you start drawing stuff named "4-(1-Methylethyl)heptane(4-Isopropylheptane)" that it becomes a pain in the ass.[/QUOTE] that's eeasy to draw, it could be muuch worse.

[QUOTE=Pome;21461671]that's eeasy to draw, it could be muuch worse.[/QUOTE] I know, but it's still fun to draw. Plus it looks cool. [IMG]http://img227.imageshack.us/img227/8281/41methylethylheptane4is.png[/IMG] edit oh fuck that's 4-(1-Ethylpropyl)-2,3,5-trimethylnonane. My bad.

i didn't think that was correct. but, below is a image to solve your original question. [img]http://www.chem.gunma-ct.ac.jp/phys/jugyou/orgchem2k/3-30f.png[/img]

[QUOTE=Pome;21461692]i didn't think that was correct. but, below is a image to solve your original question. [img]http://www.chem.gunma-ct.ac.jp/phys/jugyou/orgchem2k/3-30f.png[/img][/QUOTE] That's cyclohexane, I need cyclopentane. Five sides.

Hey, I'm re-learning this stuff at Tafe :D

[IMG]http://img685.imageshack.us/img685/5432/whath.png[/IMG] How do I do this again? You guys seem to know stuff.

Don't ask for help with your exam questions, even if they're revision. You should have learned this in class.

I like [img]http://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Tetrahydrocannabinol.svg/200px-Tetrahydrocannabinol.svg.png[/img] and [img]http://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Ethanol_flat_structure.png/100px-Ethanol_flat_structure.png[/img]

For the question you asked in OP, you could turn cyclopentane into a Cycloalkene (Cyclopentene + 2H2) and have some excess hydrogen left over. I'm not entirely sure what you were asking in OP, since 1-methylcyclobutane (The one with 4 sides that you drew) has a branch and you said you didn't want any branches. A Cycloalkene seems like the only way to change it without branching it, since Cycloalkanes can be rotated any way. Also, for the more recent question you asked, the H+ Ion should bond with the Nitrogen connected to the carbon via a triple bond if I'm not mistaken. It's the most electronegative. So basically, draw the same thing except instead of having a Nitrogen with a lone pair in it's outer shell on the bottom right, shove a hydrogen sticking off it. Hope this helps, Chemistry isn't my strong point.

[QUOTE=robowurmz;21462051]Don't ask for help with your exam questions, even if they're revision. You should have learned this in class.[/QUOTE] That's a retarded stance to take. Yes, a lot of this SHOULD have been learned in class but seeing as how exams happen at the end of the year or semester normally a lot of the stuff you learned early on may escape you. Or you may be doing practice exams to prepare for your actual exam and may come across a hard question of the likes you don't have much experience with. Telling people NOT to ask questions is stupid. At least they're making the damn effort to understand the material even if it is a little bit too close for comfort.

[QUOTE=Zinayzen;21461570] This seems like the only possibility. Am I right or not? :science:[/QUOTE] You could have the triangle thing with 2 methyl groups coming off, or an ethyl group.

This shit hurts my brain.

[QUOTE=Hamushka11;21462160]I like [IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Tetrahydrocannabinol.svg/200px-Tetrahydrocannabinol.svg.png[/IMG] and [IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Ethanol_flat_structure.png/100px-Ethanol_flat_structure.png[/IMG][/QUOTE] Dude you should totally try these too: [IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Hydrogen-cyanide-2D.svg/100px-Hydrogen-cyanide-2D.svg.png[/IMG] [IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Methanol_flat_structure.png/120px-Methanol_flat_structure.png[/IMG] Fucking awesome stuff :pcgaming:

[QUOTE=pebkac;21464365]Dude you should totally try these too: [IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Hydrogen-cyanide-2D.svg/100px-Hydrogen-cyanide-2D.svg.png[/IMG] [IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Methanol_flat_structure.png/120px-Methanol_flat_structure.png[/IMG] Fucking awesome stuff :pcgaming:[/QUOTE] what are those? i recognise the first two. [editline]04:58PM[/editline] oh, i see. hillarious.

for your on paper question: consider how basic those nitrogen atoms are. it may help you to consider the pka values for their conjugate acids. once you've decided where the acid is going to attack, it's very straightforward. just push electrons though the structure to establish your resonance forms, move charges around. [editline]12:08AM[/editline] i would do it for you but i really can't be bothered firing up chemdraw to illustrate structures for you

[QUOTE=Pome;21466189]what are those? i recognise the first two.[/QUOTE] Hydrogen cyanide and methanol if I'm not mistaken

You're learning organic chemistry? Cook me some acid bro.